98 MR688, When ever it rains I loose the marker lights on the pump including tail lights. Breaks, Blinkers and Hazards lights all work. Any thoughts where I should look first?

Thanks

Try the black junction box usually located on the drivers side frame at rear of chassis, then make sure you dont have any shorts at your connections (touching the frame). Check out both tail light boxes as well.

Sounds to me like your water is conducting and shorting across.....also check to make sure your seald beams are truly sealed if they are filling with water it could cause a short.

Sounds stupied, But check the license plate light. It happened to me. Drove me crazy. The wire wore a hole in it.And shorted the whole thing out. Hope it works

Thanks guys!

I chased it down today. I did not know if it was a bad ground or the power source. So I ran a temporary power supply and they worked. Chased the power supply up to the cab passenger side front blinker. The connection was shot! The little dab of soder was falling a part. Now they work.

Thats great, Keep on pumping