shekmark

I just picked up a new to me 86 Formula on a nice Phoenix trailer. I Uhauled home with a five pin into a round connector. Not sure what that is called. It all worked great, side lights, running lights and brake lights. When I plugged in to the connecter on my Chevy Suburban, only the brake lights worked. Any ideas why that might be? Thanks

1989mach1

could be the harness on the suberban might have a bad plug or ground. do u have a nouther trailor u could hook up to besides the new boat one?

state1310

my silverado and sierra both blow fuses all the time and only some lights work . check the inside panel and the panel under the hood .

ICDEDPPL

iTrader: (1)

ezstriper

on later model GM's the trailer lights are fused seperatly...great idea so does not kill all the lights..

buck183

All late model trucks regardless of brand are built like this. Although I hesitate to call them late model. GM started building their trucks like this in 1999.

shekmark.......It's likely a fuse. Trailer lights have circuits if their own and have nothing to do with your tail lights. Your owner's manual will tell you which fuse to check.

Use a test light or trailer plug tester to determine if you have signal at the plug on the back of your truck. If you don't, it's a fuse. If you do, it's a trailer issue.

Buck

mobuzz

Clean the connector on the Suburban....I get the same symptoms from slight corrosion on the connector, every year up here in rain country.