93 Vectra - trailer wiring problem
We have had our 93 vectra for a bit over a year but have not needed to tow with it until now. I have a ski boat with the typical 4pin flat connector and the Vectra has a 6pin round. Now the problem begins:
I bought two different adaptors thinking they would be an easy plug-n-play. They each resulted in giving me running lights and both left/right turn signals appropriately. No brake lights on the trailer, but they work perfectly on the MH.
When I start probing for voltage, I traced the wiring back from the 6 round to 6 square (48" away)
it appears that I have a wire each for left turn, right turn, running, ground, brake, and perhaps backup. My dilemma is this- when I tie the unique brake wire from the MH to the trailer turn signal circuit, it works just fine, lighting up the trailer lights. unfortunately, the adaptor doesn't "capture" this fifth wire or route it to the turn signal filaments. If I simply tie it in with the already connected turn circuit, when I trigger either turn signal it then activates both and it looks like the hazards are flashing. I thought that the brake circuit on the adaptor might have a diode that would prevent this, and shunt the brake power appropriately bu not such luck. I have also wondered if there is a flasher/relay isssue but it seems that would prevent the MH turn/brake lights from working properly.
Any suggestions? Of course, trying to get this sorted so we can leave for vaca!