HELP!! Weird electrical issue - Defender Source
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  #1  
Old February 19th, 2010, 04:02 PM
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john
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HELP!! Weird electrical issue

So Im supposed to head offroad tomorrow and I pick up my truck which is running rough and back firing. Anybody experience the following symptoms or have any idea what i should love for.

1 My Gas gauge stopped working
2 My parking lights are on even though the switch is off
3 If I turn the head lights on the truck stalls and dies.
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  #2  
Old February 19th, 2010, 04:55 PM
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Symptoms of a low/dying battery. Try a known good battery and recheck.
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Old February 19th, 2010, 04:57 PM
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got a pair of brand new odyssey's Why would the parking lights come on by themselves if the battery was dying?
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Old February 19th, 2010, 05:02 PM
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Sounds like Rover electrical gremlins...lights/switches on my Discos go on even when the car is off...maybe some bad relays?
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Old February 19th, 2010, 05:03 PM
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where are the relays for the lights? Are they connected to the gas gauge somehow?
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  #6  
Old February 19th, 2010, 05:51 PM
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Quote:
Originally Posted by phoenix37 View Post
where are the relays for the lights? Are they connected to the gas gauge somehow?
John,

You might have a couple of problems apearing as one (Bad ground and a bad light switch maybe?). I don't know the wiring on a 95 well but it could be a bad ground feeding back into another circuit (instrument lighting getting current through the gauge because the ground connector fell of and lighting the side lights maybe?). Most likely though I guess is the wiring running to the back where the guage sender wire and at least some of the lighting wires share common paths. If you have a short or bad wiring there then you might get something like this. Again, I am not an expert on 95s, just trying to give you some ideas.

I would check the common culprits 1st like the light switch and the grounds at the frame and the back of the instruments. After that your probably tracing wires back looking for cuts or shorts.

HTH

Ian
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  #7  
Old February 19th, 2010, 06:14 PM
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Thanks guys i found the problem! Turns out the shop decided to replace my license plate bulbs because they were taken out for some reason. There must be a short in there somewhere because i removed the license plate bulbs and the gas gauge starting working again, parking lights went off and it started running smoothly again. I need to find the short but at least it will get me back on the trail tomorrow.
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  #8  
Old February 19th, 2010, 06:36 PM
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Sounds mysteriously like a bad ground to me...
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Old February 19th, 2010, 06:45 PM
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Quote:
Originally Posted by Stmpede View Post
Sounds mysteriously like a bad ground to me...
Or they used the wrong bulb type; I found mine to be very picky about bulbs.
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Old February 19th, 2010, 06:47 PM
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I have been having some electrical problems...mine are from the rear wiring harness being chewed up inside the rails.
Might be worth a look...not sure if the plate bulb is part of that.
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  #11  
Old February 19th, 2010, 09:10 PM
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Im afraid the real problem is a short somewhere in the wiring harness inside the frame but as long as this works for now I aint complaining.
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Old February 19th, 2010, 09:47 PM
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Quote:
Originally Posted by phoenix37 View Post
Im afraid the real problem is a short somewhere in the wiring harness inside the frame but as long as this works for now I aint complaining.

Hhmm, I doubt it. Check all of your grounds first.
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Old February 19th, 2010, 10:02 PM
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It deffinatly sounds like a bad or corroded ground. Start doing a vd<voltage drop>test from front to back and break it down from connector to connector and repair issue.
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Old February 19th, 2010, 11:29 PM
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Hhmm, I doubt it. Check all of your grounds first.
Where are they?
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Old February 20th, 2010, 06:18 AM
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The plate light fixture itself and its ground, inside the truck under the D side speaker cover. This one will affect all the symptoms described.
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  #16  
Old February 20th, 2010, 09:47 AM
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excellent thank you.
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  #17  
Old February 20th, 2010, 10:37 AM
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I had to run a wire from the connection on the plate light to the ground on the tub on my series.
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Old March 20th, 2010, 02:12 PM
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Hi Guys,

I need some help tracking down an electrical problem on my 97. The problem started with all the running / parking lights on the pax side of the truck not working but the driver side was fine. About a week later all the interior gauge/switch lights and the driver side running / parking lights are also inop. (not sure if related but I also do not have power to the rear interior light.)

I can illuminate all the running lights if I power them from the firewall multi plug behind the heater. I have also checked that I have power coming out of the park light / headlight switch. My XP computer has crashed so I canít access my wiring diagram.

Does anyone know where I should look next? What is in-between the switch and the multiplugs that would also effect the gauge lighting? I have checked fuses but not sure if there are any relays or the MFU??

Thanks in advance.

Attached is a few shots from last weekend in Oman (200K through the dunes)
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  #19  
Old March 20th, 2010, 02:36 PM
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If I were to guess It could be the same problem I had. My wiring harness was chewed up inside the frame rail. It was bad a few feet in from where it comes out of the hole on the passenger rear at the cross member. I had my entire harness pulled out. 3-foot long sections where replaced and all of my problems were fixed. Instead of putting it back inside the rails it was taped up and zip tied to the fuel line. Turned out to be a very easy fix and cheap.

Just a though.

Good Luck



Quote:
Originally Posted by Cmikefly View Post
Hi Guys,

I need some help tracking down an electrical problem on my 97. The problem started with all the running / parking lights on the pax side of the truck not working but the driver side was fine. About a week later all the interior gauge/switch lights and the driver side running / parking lights are also inop. (not sure if related but I also do not have power to the rear interior light.)

I can illuminate all the running lights if I power them from the firewall multi plug behind the heater. I have also checked that I have power coming out of the park light / headlight switch. My XP computer has crashed so I canít access my wiring diagram.

Does anyone know where I should look next? What is in-between the switch and the multiplugs that would also effect the gauge lighting? I have checked fuses but not sure if there are any relays or the MFU??

Thanks in advance.

Attached is a few shots from last weekend in Oman (200K through the dunes)
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