Map Light Switch Out?

[Powerman5K]

Question for the smart people:

I currently have the basic dome light in my truck:



I recently was gifted the updated version with the extra map lights:



Will this new one work? Is it as simple as plug and play or will it require some extra wiring work?

[Powerman5K]

Sorry, I have the Map light on the bottom left that I'd like to install.

[ArdWrknTrk]

The Lg/Y constant power wire should already be up there but not attached.
Door & panel switches power the dome light through the Bk/Lb wire.
Ground is through the mounting screw.

Here's the 1980 EVTM....



Edit: on second look I see both wires at C406 and C705 but I see the Lg/Y wire also has connection at C202 which would be at the bottom of the driver's B pillar.
The 1980 harness is a little unique, and I can't say circuit 54 is continued up to the lamp if the map light wasn't optioned for your truck
At worst you would have to push a wire from the lamp down to the cab corner.

Sorry if I don't know these first year trucks as well as I do the later ones.  

[ratdude747]

If memory serves my '84 doesn't have the second wire (had a stock headliner, but the non-map light).

[ckuske]

My truck originally had a map light.  When I bought it back, it the dome light.  I've since bought a nice NOS dome light and installed it. (the dimmer light isn't great, but I like the nostalgia off the warm light though that opaque lens, and the map lights are cool in general) No wiring changes were needed, at least in my case.