Troubleshoot problem with running lights??

[Keith Kaiser]

Need insights/suggestions on troubleshooting problem with running lights. My directional lights are working but running lights are not. Help?!

[Steph and Dud B]

Did they work for you before and just stop working? How old is your Oliver?

[Keith Kaiser]

Oliver is 2022 LE II. We know they worked last spring when we towed from TX to WA. Been sitting in WA all summer, during which time we haven't towed it.

[Steph and Dud B]

The most common cause of failure is the 7 pin plug and connector between the truck and trailer. Check the contacts on each for bent connectors or corrosion. (I've been able to resurrect a trailer connector in the past by gently bending a prong back into place with a flathead screwdriver, but with a trailer so new yours shouldn't be that worn.) CAUTION: Pin 4 on both truck and trailer may be "hot" (connected to the battery) at all times in some installations, so don't short that one out.

[topgun2]

A "Q-tip" to help clean things out and then some dielectric grease - you can put that in the trailer plug with another "Q-tip".

Past that - check your fuses.

Bill