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Old 04-18-2019, 05:44 PM   #26
Cougar4
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The fuse also supplies power to the HID relay and the headlight leveler switch.
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Old 04-18-2019, 05:53 PM   #27
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Neither of which I have, as I have a bare-bones 2.5i.
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Old 04-18-2019, 10:36 PM   #28
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Where did you tap into the power for the switch lighting of the new switch you added?
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Old 04-18-2019, 10:48 PM   #29
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The new harness, added after I discovered the illumination stopped working, is run directly off the battery. I took the relay out of the fog light circuit, too.
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Old 04-19-2019, 01:41 AM   #30
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The short could possibly be inside the harness somewhere where you can't visually see it. If that is the case you would need a tracer that works on finding shorting issues.
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Old 04-19-2019, 06:08 AM   #31
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The aftermarket harness isn't involved with fuse 12, though... And I installed it after I di the interior lights stopped working.
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Old 04-19-2019, 12:09 PM   #32
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Logically, it would seem that the trouble was caused while working on the mod. It also seems that the problem would be with the switch lighting power area since the new switch was back lit. Even if the trouble has nothing to do with the new mod, the trouble is there and could very well be in the original wire harness, where it can't be seen visually. A tracer would be needed to find the trouble inside the harness, unless it was cut open and the wire followed from the fuse to each circuit until the problem is located. Having a shorting problem inside a harness is a rare thing but it can happen. If you have looked over every area the lead ties to and seen no problems then it seems the trouble is hidden inside the harness.

Have you disconnected the cluster to verify the trouble isn't inside it?

Last edited by Cougar4; 04-19-2019 at 12:20 PM.
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Old 04-19-2019, 01:16 PM   #33
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I have not, as I didn't want to mess anything else up... If I can't figure it out this weekend, I'm taking it to a local automotive electrician.
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Old 04-19-2019, 04:20 PM   #34
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Disconnecting connectors is an easy way to try and locate the problem area. The simplest thing to do for these type of problems is to disconnect all the devices that are tied to that circuit, one at a time, to see if the trouble is with one of the loads the problem circuit ties to, like a problem within the cluster or the BIM. Once that is eliminated along with looking for any possible external damage to the harness, that leaves the harness itself pretty much as the source of the problem. Almost always the fault is caused by a problem external to the harness itself.
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Old 04-19-2019, 06:02 PM   #35
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Alright. Still have some daylight left, so I'll see what I can dig up.
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Old 04-19-2019, 06:12 PM   #36
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Good luck on the hunt.
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Old 04-19-2019, 06:34 PM   #37
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Light's gone down below the hill. After checking with all 3 plugs out, still couldn't find the short... Either I'm not very good at this (entirely possible), there's an ACTUAL gremlin in there somewhere, or I managed to FUBAR something deep within...
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Old 04-19-2019, 07:36 PM   #38
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Well this kind of problem can be frustrating to work on since the power goes to a number of different places in the dash area. It also supplies power to the glove box light. Having use of a circuit tracer would be a big help in finding this trouble.
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Old 04-19-2019, 07:44 PM   #39
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That it would... Only one at the parts shop was grabbed by someone else...
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Old 04-19-2019, 07:52 PM   #40
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Well, you are not alone with this sort of problem.
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Old 04-19-2019, 07:54 PM   #41
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He was working on an '06 Grand Cherokee with shifting issues... I figured his problem was more important to solve than mine.

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Old 04-20-2019, 02:16 PM   #42
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The plot thickens... As of 12:15pm, my parking lights no longer work. Things just got well above my pay grade.
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Old 04-20-2019, 02:43 PM   #43
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Check the fuses in the dash first and fuse 7 in the panel under the hood.
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Old 04-20-2019, 02:45 PM   #44
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Will do. Know what amperage fuse 7 is off hand?
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Old 04-20-2019, 02:57 PM   #45
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It is a 20A fuse.
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Old 04-20-2019, 03:04 PM   #46
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Yep, that's fixed. If only the rest was that easy...
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Old 04-21-2019, 04:24 PM   #47
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One more thing to check out for the short. There is a 7 pin connector that connects the violet wire and others to the dash fuse panel. Remove that connector to see if the short is still there. If so, the short is inside the fuse panel itself.
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Old 04-22-2019, 09:02 AM   #48
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Any recommendations on a test light?
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Old 04-22-2019, 12:16 PM   #49
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You can purchase a cheap test light and it will work just fine for most jobs. There are more expensive ones that use battery and ground leads also for doing more in depth testing. It depends on what you want to spend. Most of the time you are just wanting to know if power is getting to where it should be.
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Old 04-22-2019, 12:20 PM   #50
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So one from, say, NAPA or O'Reilly's will work just fine, or could I test with the multimeter? And where exactly would I put the probes to test?

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