Diplomat Electrical Help?

[YC1]

Originally Posted by Fro

I am currently being frustrated with the same issue: curb side marker/turn works fine. all other marker/clearance lights dead. Plus my brake lights went out.

The brake ights were half solved with new bulbs, even though the ones in there were only a couple years old. But,... the left was noticeably brighter than the right. What a headscratcher, it was like the right wasn't grounded right. I cleaned the socket well and now both lamps are nice and bright. The sockets are pretty brittle and will need replacement. The third brakelight is still not operational.

I have quadruple and quintuple checked the fuses in the main panel and monaco 1 & 2 boxes. I also pulled the relevant relays and tested them. I cannot find where there is a problem on the power side. So, that leaves ground?

Anyone have any idea where the ground points for this circuit are?

Grounds can be anywhere and a headlight at night works well to find them.

Clean a good spot for a ground or go to your battery post with a long wire. Use your voltmeter with that ground and measure both sides of the lights in question with the lights on. IF you see 12.5 or so on the hot side, the hot side is working. If you see any voltage on the other side, say 1-4 volts, your ground is bad. At that point you can touch the negative lead of the voltmeter that has the long ground on it to the low voltage and the lights will get brighter. For safety it is always nice to put a fuse inline with that long jumper.

[AnotherMike]

Don't forget... LED lights are polarity sensitive. Incandescent lights aren't. If the original installer swapped the wires as he installed the fixtures the old bulbs worked, the new LED replacements would not... Use your test meter on the socket and see if the center pin is + and the shell is -
Or use the ground test wire for the negative on your meter and see f the pin or the shell of the socket is +

Mike

[Streetfarie]

Hey Question about upgrading to LEDS. I know some vehicles it isnt an issue but others it can fry the whole electrical system unless you buy a kit that accompanies the LED upgrades.Buddy did upgrades without kit that was less than 50 and ended up replacing whole electrical system blew when he turned it on. Do LEDS require AC vs DC, is that why it wouldnt work?

[YC1]

Originally Posted by Streetfarie

Hey Question about upgrading to LEDS. I know some vehicles it isnt an issue but others it can fry the whole electrical system unless you buy a kit that accompanies the LED upgrades.Buddy did upgrades without kit that was less than 50 and ended up replacing whole electrical system blew when he turned it on. Do LEDS require AC vs DC, is that why it wouldnt work?

Welcome to the forum:

Impossible to "fry the whole system". More specifics needed.

LED's are DC. They run off the existing 12 volt system. Most are just plug and play. Use the little green box above and to the right to do a search. It says, powered by Google. There are hours of reading that should help.