Running lite blows fuses

[jcrowder47]

RV blows 20 amp fuse that run all of the running lites for the rv and towable. After 6 very long days without the help of diagrams, I finally located the problem. One of the wires that control one of the many running lites, is shorting to ground. On my rv, which is a Ford f53 chassis, there are two sets of factory connectors. One set is located behind left front tire on the inside of the factory chassis, the next set of connectors is behind the left rear tire set. Disconnect the oval looking connector (mine is oval looking), it may be connected to the chassis by a plastic push pin. Also disconnet the same looking type of connector in the rear area. Replace the 20 amp fuse (or what your unit calls for). Turn your lites on, if your lites work OK, don't party yet. If you have leveling jacks, put the front down all the way, recheck your lites, if they are still on, you are 1/3 there, if the fuse blows, you have a wire that is being pinched by the chassis. If this part works good, connect the front set of connectors only, try the running lites, the front set and the side running lites only should be on. Need to raise and lower the front leveling legs. If the fuse blows at this time, you have a wire that is being pinched, this problem may be the same as mine, it turned out that the manufactor miss ran the line for both side markers. Each line only had one lite green color wire. I have to cut the wire and the plastic housing harness and reroute each so they would not pinch and short out. If the fuse does not blow with the front set connected, and raise and lowering the unit, then most likely the short is located after the rear set of connectors. Good place to check is connector for towing. You may have to do alot of crawing on your back. I also found some other possible problems with the manufactor wiring. It looks like they ran wire just to run the wire. Not looking to see if the unit may cause that wire(s) over time may pinch or crushed.

[jcrowder47]

RV blows 20 amp fuse that run all of the running lites for the rv and towable. After 6 very long days without the help of diagrams, I finally located the problem. One of the wires that control one of the many running lites, is shorting to ground. On my rv, which is a Ford f53 chassis, there are two sets of factory connectors. One set is located behind left front tire on the inside of the factory chassis, the next set of connectors is behind the left rear tire set. Disconnect the oval looking connector (mine is oval looking), it may be connected to the chassis by a plastic push pin. Also disconnet the same looking type of connector in the rear area. Replace the 20 amp fuse (or what your unit calls for). Turn your lites on, if your lites work OK, don't party yet. If you have leveling jacks, put the front down all the way, recheck your lites, if they are still on, you are 1/3 there, if the fuse blows, you have a wire that is being pinched by the chassis. If this part works good, connect the front set of connectors only, try the running lites, the front set and the side running lites only should be on. Need to raise and lower the front leveling legs. If the fuse blows at this time, you have a wire that is being pinched, this problem may be the same as mine, it turned out that the manufactor miss ran the line for both side markers. Each line only had one lite green color wire. I have to cut the wire and the plastic housing harness and reroute each so they would not pinch and short out. If the fuse does not blow with the front set connected, and raise and lowering the unit, then most likely the short is located after the rear set of connectors. Good place to check is connector for towing. You may have to do alot of crawing on your back. I also found some other possible problems with the manufactor wiring. It looks like they ran wire just to run the wire. Not looking to see if the unit may cause that wire(s) over time may pinch or crushed.

[RV Wizard]

jcrowder47, welcome to iRV2.com. We are glad to have you join us here and look forward to reading of your adventures and experiences. Thank you for taking the time to post of the shorted running light circuit. It sounds like it was a bear to find. Glad you did and hope you never have to chase one down like that again. You will find we are a group of fun loving RVers that like to help each other where we can. Hope you will be an active participant on the forum. If you get the time you may want to create a signature in your profile page and even post some photos in due time. Good luck and take care.