I’ve got a D150, I’m going to add the map light above the gauges. Of course it’s not wired for it so, I thought, I’ll wire it in, no problem. Here’s the goofy thing, I wired the new glove box light and it on the same circuit, as shown in my factory manual. The glovebox light works fine, the map light, will work, direct off the battery with the switch. My test light works with the switch, when I touch both contacts for the bulb, when wired to the truck. I’ve tried 3 bulbs, I know are good, they will not light. Ground is good, power is there. I remember back in the day wiring a Lincoln dome/reading light assembly in a couple trucks. The switch actually gave it ground. Please tell me what I’m missing here. Thanks in advance!
Map light on a 93 D series.
- Thread starter Demonram
- Start date
7mopar
Well-Known Member
Got to be either juice or ground. I think my 82-map light has a plastic housing. Check for grounding.
NioMarvin83
Active Member
It sounds like the issue might be with the grounding of the map light. Since the switch is meant to complete the circuit, you may need to make sure the ground for the light is connected properly.
Here’s what to check:
Ground connection: Make sure the map light is grounded to a metal part of the truck that has a good connection to the battery ground. If the light is not properly grounded, it won’t work, even if power is present.
Wiring setup: If the switch is supposed to give the light a ground, check if the switch is connected to ground properly. Some switches complete the circuit by providing a path to ground when turned on.
Check the switch: Make sure the switch itself is working. If the switch doesn’t provide a complete ground path, the light won’t turn on.
Since the light works directly from the battery, the issue is most likely with the ground or the way the switch is wired.
Let me know if that helps or if you need more info!
Here’s what to check:
Ground connection: Make sure the map light is grounded to a metal part of the truck that has a good connection to the battery ground. If the light is not properly grounded, it won’t work, even if power is present.
Wiring setup: If the switch is supposed to give the light a ground, check if the switch is connected to ground properly. Some switches complete the circuit by providing a path to ground when turned on.
Check the switch: Make sure the switch itself is working. If the switch doesn’t provide a complete ground path, the light won’t turn on.
Since the light works directly from the battery, the issue is most likely with the ground or the way the switch is wired.
Let me know if that helps or if you need more info!