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      06-14-2018, 09:02 PM   #1
socale39
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Drives: 04 545i SMG
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Trailer Light Help...

So I’m having a strange problem where my trailer lights were working fine two weeks ago however just last week I tried connecting to a uhaul trailer and no dice. I was able to confirm that it is indeed the car as the guy was kind enough to show me the lights worked using his truck. The last rental I was having intermittent issues but it seemed to resolve itself after I fiddled with the trailer connector but now I’m having no luck.

I’m wondering if anyone can try a test for me and with just the ignition on, do you get power to the 4-pin connector at the hitch? I tested mine and I wasn’t able to see any voltage across the various pins. I’m just not sure if I should see voltage to those pins with the lights on and the key set to on, not running.

Any help would be greatly appreciated! Also all fuses checked out ok.
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      06-14-2018, 09:29 PM   #2
socale39
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Well after further testing I found the problem. The harness connector on the hitch side somehow came just loose enough to not make contact with terminals. Not sure how it got loose but I think we are back in business.
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