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| Author: | Boating _N_IL [ Fri Aug 22, 2008 12:08 pm ] |
| Post subject: | Wiring Harness Problem |
I have a problem. I have no right turn/stop light on my trailer. I thought it was the trailer, but after having that fixed have found out it its my Jeep Cherokee. I tore into the wiring today and isolated the wire which must be bad, but followed it back as far as I could with no sucess. Has anyone had this problem. Does anyone know a good wiring guy? I don't want to spend a fortune. Will take my chances with one brake light for the rest of the season if it is going to be too expensive. Any help would be appreciated. |
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| Author: | 230 Mike [ Fri Aug 22, 2008 12:43 pm ] |
| Post subject: | Re: Wiring Harness Problem |
Is the right tail light working? Start with the possibility of bad ground at that fixture, that's the most common point of failure. Do you have power at the Jeep's connector for that light? |
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| Author: | Boating _N_IL [ Fri Aug 22, 2008 3:40 pm ] |
| Post subject: | Re: Wiring Harness Problem |
My jeep lights are fine. I have power at all terminals in harness except right turn/stop. I thought it might be the plug, but I checked it out and seems fine. The wire for the right turn/stop (brown/white wire) is dead as far back as I can get under the jeep. Followed it back as far as I could looking for the problem. Ground would kill just one terminal would it? My other lights work. |
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| Author: | Nubby [ Fri Aug 22, 2008 7:12 pm ] |
| Post subject: | Re: Wiring Harness Problem |
My guess is that your connector from your vehicle, or possibly the trailer is bad. Have someone watch the light and wiggle the two back and forth while connected. You'll probably be able to get it to work. I had the same problem with mine. When I towed it was intermittent but with my buddies truck it always worked. After wiggling the connectors and getting mine to work, I just replace the 4-prong on my Tahoe and it works great! You can always simply test the harness before tearing into the wiring also. Nubby |
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| Author: | 230 Mike [ Fri Aug 22, 2008 10:01 pm ] |
| Post subject: | Re: Wiring Harness Problem |
I'm probably tired, but I'm not sure I understand. The Jeep lights are OK, I'm with you there. Are you getting voltage at the correct pins in the trailer connector on the Jeep? Normally there are only hot wires running to your lights; the circuit is completed to ground by the housing being screwed to the trailer frame. Any corrosion where the housing is mounted (or where the light's pigtail ground wire is connected if it has that) will cause just that light to not work. |
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| Author: | Boating _N_IL [ Sat Aug 23, 2008 2:17 am ] |
| Post subject: | Re: Wiring Harness Problem |
230 Mike wrote: I'm probably tired, but I'm not sure I understand. The Jeep lights are OK, I'm with you there. Are you getting voltage at the correct pins in the trailer connector on the Jeep? Normally there are only hot wires running to your lights; the circuit is completed to ground by the housing being screwed to the trailer frame. Any corrosion where the housing is mounted (or where the light's pigtail ground wire is connected if it has that) will cause just that light to not work. Everything works except right turn/stop light on trailer. Had someone work on the trailer for me I found out it was my tow vehicle. I have voltage to the Harness everywhere except terminal for right turn/stop. Followed wire back from harness as far as I could and it was dead as far as I could reach. Pretty sure that wire has to be bad somewhere. |
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| Author: | 230 Mike [ Sat Aug 23, 2008 3:12 am ] |
| Post subject: | Re: Wiring Harness Problem |
If you're sure the problem is in the Jeep, any decent mechanic ought to be able to troubleshoot it for you. |
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| Author: | jzellers [ Mon Aug 25, 2008 6:54 am ] |
| Post subject: | Re: Wiring Harness Problem |
I don't know what year your Cherokee is but if it has the factory tow package you could have separate fuses for the trailer harness. I know the newer Dodge trucks have the separate fuses so you might want to eliminate that first. |
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| Author: | dgdake [ Mon Aug 25, 2008 1:28 pm ] |
| Post subject: | Re: Wiring Harness Problem |
I agree you need to look for the fuse. Do you unplug your harness from the tow vehicle when you put the trailer into the water? That could help if it is a poor connection. (Just don't forget to hook it up again when you leave). As already pointed out, you should look for the grounding at the light as it is usually the problem. Clean up any corrosion and put on a little connector grease (make sure it's conductive, not regular wheel bearing type). |
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| Author: | millhaven_nice_guy [ Mon Aug 25, 2008 2:40 pm ] |
| Post subject: | Re: Wiring Harness Problem |
This is a pretty simple fix. Remove your right tail light and splice a new wire down to the trailer harness. Just abandon the wire that goes to the front. |
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| Author: | Jim_R [ Thu Aug 28, 2008 7:52 am ] |
| Post subject: | Re: Wiring Harness Problem |
Is your Jeep still under warranty? If so run it by the dealer. If not, and you don't feel like splicing and running a new wire as m_n_g suggests, you could have it fixed by your local u-haul dealer (or equivalent). |
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| Author: | KSJ8 [ Sat Aug 30, 2008 9:23 pm ] |
| Post subject: | Re: Wiring Harness Problem |
Do you have the JEEP mfg'd tow harness plugged into the JEEP or an after market brand? I went nuts thinking it was my old Karavan trailer last season also had the same problem on my utility trailer. I used 2 different models from (can't remember who mfg'd it a name brand of trailer parts) E-trailer & the local trailer dealer. Come to find out the diodes in the harness couldn't handle the power w/the 3 tail light newer vehicles. I went to JEEP dealer got the Harness made for the liberty, installed it & have not had a problem since. |
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| Author: | KSJ8 [ Sat Aug 30, 2008 9:27 pm ] |
| Post subject: | Re: Wiring Harness Problem |
jzellers wrote: I don't know what year your Cherokee is but if it has the factory tow package you could have separate fuses for the trailer harness. I know the newer Dodge trucks have the separate fuses so you might want to eliminate that first. I don't know if the 05 Cherokee has seperate fuse, BUT I know the 07 has one for each R/H, L/H trailer brake, parking lites in the fuse box under the hood. Look in owners manual for the exact location .I fixed my neighbors + he had a bad trailer gnd. |
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