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Old 06-24-2016, 11:12 PM   #1
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Bright toad tail light!

I have a 2015 Cherokee, with diodes, I tow it behind a Baystar, Ford chassis. My left tail light is much brighter than the right tail light. It's like the brake is on, not the tail light. If I hook the car behind a different tow vehicle the lights operate normal, both tail lights have the same brightness. This makes me think the lights on the car are wired correctly.
So how is one running light brighter when hooked to the RV and normal when hooked to another vehicle? The lights all have the correct function, just one is brighter.
Any ideas? Thanks
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Old 06-25-2016, 02:07 AM   #2
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No ideas , but I'm going to tag along to see if anyone has , and to see if you get it fixed.
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Old 06-25-2016, 12:29 PM   #3
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Check your ground for that tail light. If needed, run a separate one.
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Old 06-25-2016, 12:42 PM   #4
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Hi,

To me it sounds like the running light and left brake light wires are swapped at the RV. There are a bunch of socket testers at Amazon that might help you find the problem. Here is a link; https://www.amazon.com/s/ref=nb_sb_n...nnector+tester

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Old 06-25-2016, 04:23 PM   #5
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Quote:
Originally Posted by Bill WA6YBD View Post
Hi,



To me it sounds like the running light and left brake light wires are swapped at the RV. There are a bunch of socket testers at Amazon that might help you find the problem. Here is a link; https://www.amazon.com/s/ref=nb_sb_n...nnector+tester



~Bill

Yes for just done with this issue while installing a Hopkins light kit from the factory. After 3 hours I found the brown wire and purple wire were installed in the diode at the factory. After that all lights worked great. Depends on your bulb combo also light/ brake and turn for second filament, FYI the tighter larger spring ( normally shorter than the other) will be brake/turn signal).


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Old 06-26-2016, 12:21 AM   #6
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I'm at a loss! My Jeep lights work normally when plugged into other vehicles. My RV lights work normally when plugged into other vehicles. The two just don't work properly together. Got to be a resistance or diode issue?
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Old 06-26-2016, 07:56 AM   #7
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Are you using the same toad cable to connect to all the vehicles you are testing? If not, you haven't proven anything with the tests. You need to isolate the problem by checking the big parts first.

Use a multimeter to check the actual voltages coming from your MH connector, and record the source for each pin . All should be at 12V or above when they are active. If these voltages all appear to be OK, you have eliminated the MH wiring.

Using the info you recorded in the above step, use a 12VDC source (battery or batt charger) to apply 12V to each lead on your toad connector. If the lights all appear to be OK you have eliminated the toad wiring.

In the same manner, apply 12V to each connector on the MH end of your toad cable.

Doing all these steps should allow you to isolate where the problem is and tell you what you need to change to fix it.
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Old 06-26-2016, 11:01 PM   #8
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grumpytoo,
As others have suggested, some tests need to be done. A multimeter has been suggested but, in some cases, a simple test light is all you need. For instance, if your coach lights are working just fine without any toads hooked up, then that eliminates one part of the equation.

The next thing to check is, the actual plug on the coach. Make sure it's putting the correct signals, to the correct pins. That is, tail/marker for one pin, RT turn/brake for another pin, LF turn/brake for another pin, Ground for a fourth pin and then, if you have a 7 pin connector, the others are of no use for your present problem.

Then, hookup the pig tail to your coach. Now, test all the pig tail output pins, without it being hooked up to the toad. If all is well there, then yes, you have a compatibility problem. Bad or incorrect grounds cause numerous electrical issues on most RVs and autos. Do make sure all your grounds are clean and in good shape. But, if and when you find out the problem, do post the answer so that others may learn.
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