40amp tow fuse blows/loss of brake/turn signals

[RockyMtnRay]

Originally Posted by Steverino

Thanks for your thoughtful responses...

I did some further checking (& sweatin' - jeez what a sticky day!)... Anyway, I found some bullet connectors on wires under the trailer - coming from the fridge area and going up the rear shell arm. Tested and got current on the two that are for the brake & turn signal lights. So I guess the next step is to check for continuity from that point to the light socket. I am presuming I'll find a broken circuit. The odd thing is that BOTH lights are misbehaving and they would not be linked (since they operate independently). I can't yet figure out the connection.

I'll be reading the suggested links for further clues.

Thanks,

Steve

The trailer uses a 2-lamp (actually 2 filament) tail/brake/turn system: the turn and brake display on each side is performed by the same filament in the same bulb (the other filament in the bulb is for tail/running light). Your TV uses a 3 lamp system (separate bulb or filament for each purpose)...there is a converter in the TV that converts the 3 lamp signals to 2 lamp signals. Since
brake/turn don't work...but there is a signal going to the bulb, you either have a bad lamp fixture with corrosion (not surprising on a '99 model in the Northeast) or you could have a bad ground coming back from the fixture. Remove the lamp cover and bulb and start checking for signal there as well as if there's good continuity (will require an ohmmeter) on the ground side (typically the connector attached to the base of the bulb).