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Old 02-16-2014, 11:11 AM   #1
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clearance lights

having a issue the front clearance light on the left is dimmer than the right , aluminum trailer ,grounds seem good . have 9.5 volts at left light 10.5 volts on the right ???

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Old 02-16-2014, 11:31 AM   #2
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Originally Posted by bailbud View Post
having a issue the front clearance light on the left is dimmer than the right , aluminum trailer ,grounds seem good . have 9.5 volts at left light 10.5 volts on the right ???
Sounds like bad connection on the left side front clearance light. Look for loose connection on positive or negative wires. Look for corrosion at connections or wires and clean it up with wire brush. Look for exposed or frayed wires making contact to the trailer or wires. And if you haven't, try a different bulb. Could also be that run of wire is corroded beyond use. Try bypassing that wire with a temporary wire.

Good luck,


Rich & Patricia
00 F350 7.3L___89 Terry Resort 25.5
___03 Klamath 30hp

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Old 02-16-2014, 11:42 AM   #3
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Since you do not have full (12VDC) at either light, then there is a resistance issue somewhere in the circuit. The problem is locating it with these runs typically buried inside the wall structures of the RV.

I would start checking where I could access (plug, pigtail end, and light bulb socket) to clean and protect the connections. A joint might look good, but still have some resistive issue from corrosion or dirt. And be sure to check/clean the ground connections too at any point...this could be the result of a combination of connections with slight resistance.

Best luck
Kim and Steve, Mustang LCDR (Ret), '07 Damon Outlaw #1193
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Old 02-16-2014, 06:49 PM   #4
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use an OHM meter and check resistance between left light and trailer plug, both power and ground to see where the resistance is, might be a lot on both sides, then do the same to right side. Should give you a starting point.
good luck
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