jdw1

when i have my trailer hooked up to my truck and turn the blinkers on, my voltage gauge goes up and down erratically. the blinkers on my truck will work fine, but the trailer blinkers wont even blink. the trailer in wired correctly, and i have a new taillight converter on it. any ideas what the problem is?

MMA_Alex

I'd bet you've got a bad ground. whered you wire the trailer ground into?

87toy.

need a better ground most likely or wherever your ground is it might need to be grinded down a little bit so it has better contact.

, or your fuses and or relays need to be replaced. What year is your truck? sometimes old wires will not pass all the current

or... your alternator needs replaceing

jdw1

I have it grounded to the truck and the boat trailer. my truck is an 87. what relay would i need to replace? how can i tell if my altanator is bad?

Jay351

Just to clear things up its normal for your volt guage to fluctuate when you have your blinkers on.

jason191918

Do you have a converter is that generation different than my 92?

MMA_Alex

where on the truck? if its grounded to the hitch, or onto a rusty/coroded spot its not a good ground