Hi all,

Purchased a 2002 KJ 3.7L auto in the UK last week, have a few issues..

1. While driving home I found I only had dipped head lights, it turned out someone had removed the high beam relay. I purchased one from my local Jeep garage and installed it. All seemed ok until I started it this morning. The newly installed relay was buzzing very loudly. If I turned the lights on dipped the buzzing stopped. The start of the buzzing seemed to coincide with selecting drive. It has done this twice now. I took the relay out the first time and installed it a while later, it was ok until the following day when the buzzing started again.

2. Interior lights flashing on and off. I have read on this forum that the cause in the column switch for the indicators / head lights, I have ordered a new one today.

3. While driving to work in the heavy rain and on cruise, the cruise cut out and would not re-engage for the rest of the journey. The throttle became erratic for a short time, a similar feeling to a misfire. The Jeep stood for 6 hours at work, driving home on cruise, everything was working well again.

Any help welcome, has anyone had a buzzing head light relay and if so how was it fixed?

Thanks in advance for any assistance.

Mikey.

Update:

Replaced the column switches which I hope has solved the various lights and relay issues.

This just leaves the throttle issue. It did the same in the dry today, except I now realise how I caused it and can replicate it. If I accelerate harder than normal, maybe half throttle, when I back off the throttle slowly I can feel the engine kicking like it is receiving irregular throttle movements. Not many people in the UK have the gassers so struggling to get any advice. Does this sound like a TPS or throttle body issue?

Replaced the column switch, still have the buzzing relay. Established it is caused when the handbrake is released (when the park brake light goes out). It comes and goes dependant on the park brake light.

As for the throttle, did the key on trick with the ignition and discovered P0122 which kind of confirms my thoughts on the TPS. Checked the voltage on the wiring, all seems good so will replace the TPS.

Feel free to jump in any time as I am starting to feel like I am talking to myself...

Hi Mikey, Looks like you're making progress working out the bugs on your rig. I would chime in with something useful, except I don't know much at all about the electrical systems you're working on. But, I wanted you to know you're not alone!

Good luck with the repairs. Cheers, --LFH

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2008 Liberty Sport 4x4 Automatic

Jeepin By Al 4" Lift Kit
BFG KO2’s 245/75R16
Full MOPAR skid plates
Rock Lizard Skink Super Sliders
AtTheHelm Front Recovery System & Roof Rack
M116A3 Trailer build thread: viewtopic.php?f=72&t=77997

I purchased mine about a year ago, I have had similar gremlin problems. There is no real easy way to deal with these things, especially if it is intermittent. I had an issue at my power control module and I finally fixed it by pulling all the covers off and cleaning every connection.

I now have an intermittent fan problem and replacing the fan resister didn't fix it. I will have to look at the electrical diagrams and trace the wires to every connection to see if I can find a problem.

_________________
2002 KJ Limited 3.7
Completely Stock
215/85R16 Kevlar

Final update...

Had no more flashing interior lights since changing the multi function switch. Also changed the TPS, hoping that will permanently cure the throttle issue. And now for the biggie!

Remember the buzzing headlamp relay? After pretty much dismantling the whole car tracing wires etc, I am pretty certain that the guy who owned it previously has had daylight running lamps turned on. Why do I think this? Because the buzzing from the standard headlamp relay coincides with the behaviour of the daylight running lamps. It is fine with handbrake on or with headlights on as this is when daylight running lamps are off. As soon as I release the park brake and unless the headlights are on, the relay buzzes and I see a dim full beam (which is daylight running for Canada).

Tomorrow I will call my Jeep dealer and find out if he can obtain the DRL relay and the cost against the cost of switch the body control module back to UK spec.

All my Jeep issues are resolved... for now!

Well done for tracing it!

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Light Khaki 2.8CRD: TJM alloy bumper; Skid Row &Asfir skids;ext. breathers; SAMCO hoses; Grabber At3 235/70/16; Fumoto; Euro TC; Odyssey PC1500;GDE FTEcotune; OME lift; lightforce driving lights;ARB diff cover;nylon fan+Hayden2905;ss vortex exhaust; Airflow snorkel; Frontrunner roofrack; rock rails