Dome light wiring

[British Slave]

Anyone have a wiring diagram for an 87 that shows a one wire dome light circuit on the drivers door? The diagram in my service manual shows a three wire switch and mine is single wire.

 

[British Slave]

Anyone? I just need to know where the tan wire goes. It is connected to the jamb switch and goes behind the fuse block. I need to know where it goes from there. Thanks.

 

[Muddytazz]

My 88 has 2 wires on the drivers door jamb switch. White one and a tan one come to think of it. When it get light out this morning I'll go have a look see unless someone chimes in before hand.

 

[British Slave]

My 88 has 2 wires on the drivers door jamb switch. White one and a tan one come to think of it. When it get light out this morning I'll go have a look see unless someone chimes in before hand.

Do you have the "courtesy lighting" option? That would explain the white wire. I have what appears to be an add on courtesy lighting, and it's all white wires with an orange power wire. I am trying to get inside lights when the driver door is opened.

 

[Fordum]

All the single wire ones that I know anything about simply ground at the jamb switch.

You should be able to simply ground that one wire and the light should light.
If it doesn't, then you need to check and see if the light is getting power.

And if the bulb is good of course.

 

[Muddytazz]

IIRC the tan wire heads up to the head light switch to you can turn your dome light on. One thing to remember, these door jamb switches are prone to going bad. Your pass side jamb switch should have one wire and your drivers jamb switch should have 2 wires.

 

[Fordum]

OK, went digging through my "junk drawer" and found these. Don't know where I got them, or if they will help.

Got a couple more from those years, but I think these cover what you need.

 

[Fordum]

Wow, I hope they look better on your monitor than mine. I know they are better off my hard drive than I see here.
If you like, I can send them to you as an attachment to a PM.

 

[Muddytazz]

I was able to zoom in on it good. Info is on the first image with a white AND tan wire which routes eventually up to the directional switch on the second image. Tan wire is wire # 159

 

[Fordum]

Its good and clear on my machine when I zoom in on the local image.
For some reason its blurry online.
As long as everybody else can see it. Funny part is I can usually see others just fine.

Its also interesting that only the driver's side door has the tan wire. The right side does not.

I guess that the tan wire triggers the "dinger" when you open the door with the key in.

 

[Muddytazz]

The way these things are set up is that the passenger side switch is just piggybacked or jumpered off the drivers side via the white white.

 

[British Slave]

My passenger side is a single white wire that goes to the light under the dash, and grounds to turn on the underdash light, and both dome lights. The driver side has a single tan wire that goes behind the fuse block, and I assume somehow to the headlight switch. I can turn on the dome light with the HL switch, but the tan wire has no power on it so grounding does nothing. The switch is good. I can solve the issue by running a wire from the passenger door jamb switch to the drivers door jamb switch so either one will ground and the lights should work. OH, Auto Zone Duralast door jamb switches will NOT work in an 87 Blazer. The threads are different.

 

[Muddytazz]

I bet if you dig up in the kick panel on the drivers side you'll find a white wire that should be hooked up to that switch.

The white wire and the orange wire is what goes to your dome/accessory lighting. So it sounds like the missing white wire on your drivers jamb switch is the issue with your lights not working with the doors.

LMC has good door jamb switch along with classicparts.

 

[lectric80]

The tan wire is for the key in ignition warning, the white is for the dome light system ground. Both systems are ground switched. If you don't have a white wire at the driver's side door, you will simply need to tie one into the white dome light ground system.

The headlight switch doesn't tie into the door switches, it has it's own ground that is supplied to the white dome light wire.

 

[British Slave]

I bet if you dig up in the kick panel on the drivers side you'll find a white wire that should be hooked up to that switch.

The white wire and the orange wire is what goes to your dome/accessory lighting. So it sounds like the missing white wire on your drivers jamb switch is the issue with your lights not working with the doors.

LMC has good door jamb switch along with classicparts.

OK, you are right! The original white wire was in the kick panel. The kick panel is solid, and working thru the jamb switch I manageed to hook the white wire and get it out. The terminal had broken off the switch is why it looked like a single wire switch. Short the white wire to ground and all the dome lights work now. Now hopefully ORielly's will have the switch in the morning. Thanks to all for the help.