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 Post subject: Fuse Problems
PostPosted: Thu Jul 27, 2017 7:46 pm 
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Joined: Mon May 08, 2017 8:49 pm
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Location: Pittsburgh PA
Hello all,

Thanks for letting me join. Bought a 2005 CRD (76000 miles) back in April and been reading the posts on this site ever since. Did most of the stuff on the newbie guide (thanks!) However, I now have a pretty big issue. About 2 weeks ago my Jeep just died while i was going down the road. Long story short, had it towed to the mechanic and it was a blown fuse. The fuse was number 14 on the inside panel. He replaced the 10 amp fuse and drove it around a mile or two for a few days after giving it back to me. I took it to work the next day which is about 30 min each way and all was fine. Over the weekend didnt drive it and went to go to work again on Monday and about a mile down the road it shut off again. Luckily, I had a pack of 10 amp fuses with me. It kept blowing and it took 4 fuses to get back home. I looked in owners manual and found that that fuse has the PDC fuel pump, AC clutch, starter relay, engine controller, and Transmission controller. I am taking it back to the mechanic on Monday for him to look at it again. I am not very mechanically savvy so I will try to answer any questions to the best of my ability. Also I apologize if i posted in the wrong place etc. Hopefully someone could shed some light on this as I am very frustrated. Thanks!


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 Post subject: Re: Fuse Problems
PostPosted: Fri Jul 28, 2017 5:48 pm 
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Looks like that circuit has some control of the AC.
Are you using the AC?
Does the fuse pop with the AC off?

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 Post subject: Re: Fuse Problems
PostPosted: Fri Jul 28, 2017 6:38 pm 
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Yeah. The fuse pops with the AC off.


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 Post subject: Re: Fuse Problems
PostPosted: Fri Jul 28, 2017 7:26 pm 
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Ok.
Next I would look at PDC fuel pump. Which is the fuel pump relay in the box in front of the battery.
Pull the relay and see if the fuse continues to blow.

Does your CRD have a lift pump in the fuel tank?
The CRD did not come with a electric fuel pump from the factory.
If it does not have a lift pump it will run just fine without the relay.

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 Post subject: Re: Fuse Problems
PostPosted: Fri Jul 28, 2017 9:14 pm 
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Check wiring harness real close for any rubbed spots that would allow a wire to touch bare metal.
Several on here have had some shorts due to chafed wiring harnesses rubbed and causing a short.
Inspect them real close especially around the engine area since the engine moves and can rub wires... :wink:

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05 Jeep Liberty CRD Limited :JEEPIN:
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
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Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
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 Post subject: Re: Fuse Problems
PostPosted: Fri Jul 28, 2017 10:08 pm 
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flash7210 wrote:
Ok.
Next I would look at PDC fuel pump. Which is the fuel pump relay in the box in front of the battery.
Pull the relay and see if the fuse continues to blow.

Does your CRD have a lift pump in the fuel tank?
The CRD did not come with a electric fuel pump from the factory.
If it does not have a lift pump it will run just fine without the relay.


Sorry if any of these questions sound silly. Not too mechanically inclined.

Okay by relay do you mean a fuse?

Not sure about the fuel pump. Bought it off 80 year old guy who was original owner. I doubt he did anything with the fuel pump. Just a guess.
So you are saying it should have a lift pump in the tank only? from the factory?


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 Post subject: Re: Fuse Problems
PostPosted: Fri Jul 28, 2017 10:10 pm 
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WWDiesel wrote:
Check wiring harness real close for any rubbed spots that would allow a wire to touch bare metal.
Several on here have had some shorts due to chafed wiring harnesses rubbed and causing a short.
Inspect them real close especially around the engine area since the engine moves and can rub wires... :wink:


Okay. So the harness on top of the engine after you take the plastic CRD cover off is a good place to start? It is very random when the fuse blows as you can see in my original post. Maybe it is just a wire. Any other places to check that usually can rub? Thanks,


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 Post subject: Re: Fuse Problems
PostPosted: Fri Jul 28, 2017 10:57 pm 
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A relay is a small electric device that acts as a switch for high current loads. There is a small amount of current that passes over the coil to a ground. This creates a magnetic field to move the flipper to turn current on or off. ImageImage

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 Post subject: Re: Fuse Problems
PostPosted: Fri Jul 28, 2017 11:07 pm 
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Gotcha. Thanks HER_CRD


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 Post subject: Re: Fuse Problems
PostPosted: Sat Jul 29, 2017 10:10 am 
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DarkEnemy wrote:
WWDiesel wrote:
Check wiring harness real close for any rubbed spots that would allow a wire to touch bare metal.
Several on here have had some shorts due to chafed wiring harnesses rubbed and causing a short.
Inspect them real close especially around the engine area since the engine moves and can rub wires... :wink:


Okay. So the harness on top of the engine after you take the plastic CRD cover off is a good place to start? It is very random when the fuse blows as you can see in my original post. Maybe it is just a wire. Any other places to check that usually can rub? Thanks,

Check the harness where it goes behind the alternator/bracket and over the top part of the front of the engine. A couple members have had a rubbed wire and subsequent short in this area... :roll:

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Supporting Vendor and Moderator of LOST
05 Jeep Liberty CRD Limited :JEEPIN:
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount

98 Dodge Cummins 24 Valve


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 Post subject: Re: Fuse Problems
PostPosted: Sat Jul 29, 2017 11:38 am 
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Joined: Mon May 08, 2017 8:49 pm
Posts: 24
Location: Pittsburgh PA
WWDiesel wrote:
DarkEnemy wrote:
WWDiesel wrote:
Check wiring harness real close for any rubbed spots that would allow a wire to touch bare metal.
Several on here have had some shorts due to chafed wiring harnesses rubbed and causing a short.
Inspect them real close especially around the engine area since the engine moves and can rub wires... :wink:


Okay. So the harness on top of the engine after you take the plastic CRD cover off is a good place to start? It is very random when the fuse blows as you can see in my original post. Maybe it is just a wire. Any other places to check that usually can rub? Thanks,

Check the harness where it goes behind the alternator/bracket and over the top part of the front of the engine. A couple members have had a rubbed wire and subsequent short in this area... :roll:



Ok great thanks will check it and let ya know. Anything else I should look for?


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 Post subject: Re: Fuse Problems
PostPosted: Sat Jul 29, 2017 3:59 pm 
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DarkEnemy wrote:
Ok great thanks will check it and let ya know. Anything else I should look for?

I would just very carefully check all wiring in and around engine area. Especially any wires that come in contact with engine movement!
Good Luck!!!
You did not say where you are located. Some on this forum have the proper tools and experience for finding electrical problems... :roll:

See this post where a member found a 12v wire intermittently shorting to ground on top of his engine and blowing a fuse:
See picture at: http://colorado4wheel.com/images/libby/IMG_9161.JPG

View topic:
viewtopic.php?f=5&t=84861&p=894234&hilit=#p894234

Let us know what you find!

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Supporting Vendor and Moderator of LOST
05 Jeep Liberty CRD Limited :JEEPIN:
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount

98 Dodge Cummins 24 Valve


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 Post subject: Re: Fuse Problems
PostPosted: Mon Jul 31, 2017 3:56 pm 
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Joined: Mon May 08, 2017 8:49 pm
Posts: 24
Location: Pittsburgh PA
WWDiesel wrote:
DarkEnemy wrote:
Ok great thanks will check it and let ya know. Anything else I should look for?

I would just very carefully check all wiring in and around engine area. Especially any wires that come in contact with engine movement!
Good Luck!!!
You did not say where you are located. Some on this forum have the proper tools and experience for finding electrical problems... :roll:

See this post where a member found a 12v wire intermittently shorting to ground on top of his engine and blowing a fuse:
See picture at: http://colorado4wheel.com/images/libby/IMG_9161.JPG

View topic:
viewtopic.php?f=5&t=84861&p=894234&hilit=#p894234

Let us know what you find!



Ok great I will check around and look for bad wires. Thanks for the topic link.

I am from Pittsburgh PA.


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 Post subject: Re: Fuse Problems
PostPosted: Tue Aug 08, 2017 8:27 pm 
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Location: Pittsburgh PA
Okay just wanted to post an update.

So knock on wood it looks like the problem is fixed. Its been almost two weeks since the mechanic made his repairs.

First off for future reference, that fuse is only for the engine computer, tranny computer and maf sensor. All the other stuff i listed above is for gas engines only it turns out.

In any case what the mechanic did is crimped two inline 5amp fuses one going to each computer. The maf sensor wire that makes its way along the top of the engine he eliminated since the maf sensor is unplugged anyway due to the egr delete. (per instructions)

The wire in question is the pink/white wire. So i am guessing there was a bad part of the wire from the maf sensor on top of the engine. Never actually found a bare wire anywhere, but its been holding steady. Hope this helps someone and makes sense. Thanks!


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 Post subject: Re: Fuse Problems
PostPosted: Tue Aug 08, 2017 8:46 pm 
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Had to be a wire shorted to ground or shorted internally in the harness going across the the top of the engine to the MAF! :roll:

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Supporting Vendor and Moderator of LOST
05 Jeep Liberty CRD Limited :JEEPIN:
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount

98 Dodge Cummins 24 Valve


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 Post subject: Re: Fuse Problems
PostPosted: Tue Aug 08, 2017 9:36 pm 
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WWDiesel wrote:
Had to be a wire shorted to ground or shorted internally in the harness going across the the top of the engine to the MAF! :roll:



Yeah thats what im thinking. Keeping my fingers crossed. Thanks for all the help. Now for an upgraded exhaust of some kind.


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 Post subject: Re: Fuse Problems
PostPosted: Tue Aug 08, 2017 10:38 pm 
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Location: Oregon Coast Dairy Country. Land of stumps, dumps, and "Liquid Pumps"
Best Flow = Straight pipe Get rid of the restrictive Cat and OEM Muffler
Best Scavenging = terminate it in the low pressure area behind the rear wheel.
Best internal sound = terminate it just past the outer body / bumper line so there is no reverberation.
I chose not to wake the neighbors, and put Flowmaster 942550 tucked up just behind the rear cross member.
Edit:
With all windows up tight, and the air fan off, I can hear exhaust tone change barely enough to hear when the turbo vanes open/close.

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Last edited by GordnadoCRD on Wed Aug 09, 2017 2:00 am, edited 1 time in total.

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 Post subject: Re: Fuse Problems
PostPosted: Wed Aug 09, 2017 1:42 am 
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Get rid of CAT and choke point right in front of it. (flange) Replace with straight pipe and add Flowmaster muffler
Exhaust: Flowmaster 942542 Series 40 Delta Flow, 2.50 Center In / 2.50 Offset Out
Nice mellow tone and cannot hear it in vehicle going down the road!
It will fit perfectly in place of OEM muffler! OEM tailpipe is good to go, 2 1/2 inch all the way out to rear exit.

If you want to make noise, stright pipe and no muffler! :roll:

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Supporting Vendor and Moderator of LOST
05 Jeep Liberty CRD Limited :JEEPIN:
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount

98 Dodge Cummins 24 Valve


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 Post subject: Re: Fuse Problems
PostPosted: Wed Aug 09, 2017 9:24 am 
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Joined: Mon May 08, 2017 8:49 pm
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WWDiesel wrote:
Get rid of CAT and choke point right in front of it. (flange) Replace with straight pipe and add Flowmaster muffler
Exhaust: Flowmaster 942542 Series 40 Delta Flow, 2.50 Center In / 2.50 Offset Out
Nice mellow tone and cannot hear it in vehicle going down the road!
It will fit perfectly in place of OEM muffler! OEM tailpipe is good to go, 2 1/2 inch all the way out to rear exit.

If you want to make noise, stright pipe and no muffler! :roll:



So when you say get rid of cat and choke point you mean cut it out and run a straight pipe to muffler (new flowmaster)

Does the straight pipe from sasquatch do that? https://shop.sasquatchparts.com/product ... k-exhaust/

Then just add the flowmaster and im done?


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 Post subject: Re: Fuse Problems
PostPosted: Wed Aug 09, 2017 9:24 am 
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GordnadoCRD wrote:
Best Flow = Straight pipe Get rid of the restrictive Cat and OEM Muffler
Best Scavenging = terminate it in the low pressure area behind the rear wheel.
Best internal sound = terminate it just past the outer body / bumper line so there is no reverberation.
I chose not to wake the neighbors, and put Flowmaster 942550 tucked up just behind the rear cross member.
Edit:
With all windows up tight, and the air fan off, I can hear exhaust tone change barely enough to hear when the turbo vanes open/close.



I will check into that thanks!


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