1972 Overlander no backup lights
Originally Posted by Steinmetzmr
I bought new LEd replacement lights from Super Bright Leds and started out the day excited with plenty of vigor! The wires in the trailer to the backup lights work (P.O had new umbilical cord made left backup light blinked with right turn signal so did right backup light). So I spent most of the day studying every diagram under the sun and got the new brake and turnsignal lights to work.
First tow vehicle (2004 Expedition) the marker lights didn't work nor did the backup lights. Switch tow vehicles (1997 Ford f150) marker lights work but not backup lights. So i am fairly confident with 5/7th of the umbilical cord wiring.
The first suggestion that I would make is to check to be certain that the backup light circuit on your tow vehicle is wired into your trailer connector at the rear bumper. I know that the factory wiring on my 1999 Suburban didn't include the wire for backup lights and I had to have my Airstream dealer add that wire after I purchased my Minuet in 2003 (my '64 Overlander doesn't have the optional backup lights). If you are utilizing the blade-type connectors, the backup light and marker/running light circuit always was the first to experience corossion problems on my vehicles before I switched to the heavy-duty round-pin connectors.
Good luck locating your electrical gremlin!
Kevin D. Allen
WBCCI (Lifetime Member)/VAC/Free Wheelers #6359
1964 Overlander International/1999 GMC K2500 Suburban (7400 VORTEC/4.11 Differentials)
1978 Argosy Minuet 6.0 Metre/1975 Cadillac Eldorado Convertible (8.2 Liter V8/2.70 Final Drive)