Underdash Light 66 Mustang

AEinPA · Aug 2, 2005

Not coming on, regardless of which door is open.

I am pretty much a novice, guys.

New bulbs (BP 67, though when I pulled them - two different bulbs were in place, "67" and "97" - no owners manual). Gotta think wiring/fuse. I'm a product of more modern cars (first and oldest I owned was a 76 Mustang II), so I'm a little out of sorts.

Here's the problem.

I don't know much about the electrical system. Actually, that's being boastful. I know almost nothing regarding wiring.

Buddy told me it might be a matter of the wire not being grounded.

Anyone want to walk the dummy through this?

65and68Stang · Aug 2, 2005

Those underdash lights have to have a very good ground to work...there is a screw that holds the metal light housing to the underside of the dash. I'd unscrew that so the housing comes free and scuff up the area of the dash that contacts the housing when its installed with some sandpaper.

Also check that all the fuses are good (not sure which one it is on a 65/66). The only other thing I could thnk of that would be an easy fix would be the door plunger has gone bad.

Good luck!

Kelton

iskwezm · Aug 2, 2005

get a test light and ground the clip end.Put the sharp end in the ceter of the bulb receptacle and check for power,no power,probably blown fuse.Simple enough?

MustangMatt1966 · Aug 3, 2005

also, what happend to me, when the door opens, there is a little thing that springs up to turn the lights on and off when you clost the door, mine broke off and my lights wouldnt work period, might want to check that, just a thought

iskwezm · Aug 3, 2005

unless both door switches are broken(he said it doenst matter which door),i dont think thats it.

MustangMatt1966 · Aug 3, 2005

iskwezm said:
unless both door switches are broken(he said it doenst matter which door),i dont think thats it.

ahh, didnt think about that, my bad

65mistress · Aug 3, 2005

Ok, not to be hijacker, but they have LED lights for everything else, do they make them for the under dash interior lights too, does anyone know?

66Runt · Aug 3, 2005

Loose fuse holder

is what I found on my '66. Over the years I guess they just kind of got loose. Cleaned up the fuse and spring clips that hold the fuse then squeezed them so the fuse would be a tight fit and everything worked well.

Good luck,

Scott

jb1dsl · Aug 3, 2005

are the rear interior lights on a fastback on the same fuse ase the under dash lights, I have rear lights but no under dash. I used to could bump them and they would work but not anymore

65mistress · Aug 3, 2005

Ok, silly question, have you checked the connectors under the dash? With time and moisture it's possible that they may have gunk built up in there not allowing for a good connection.

brtnstrns · Aug 3, 2005

my passenger side underdash light doesnt come on all the time...sometimes if i punch the metal part of the dash it will make it turn on...anyone know what the deal with that is?

AEinPA · Aug 3, 2005

Well, I haven't been able to get serious time under the dash. Flippin hot in PA. I'm thinking it might have more to do with the light housing. Would use the test light...if I can find one. Should be able to, though.

The springs work with the door buttons, for what it's worth.

iskwezm · Aug 3, 2005

65mistress said:
Ok, not to be hijacker, but they have LED lights for everything else, do they make them for the under dash interior lights too, does anyone know?

yes they do and they also have hyper whites

iskwezm · Aug 3, 2005

jb1dsl said:
are the rear interior lights on a fastback on the same fuse ase the under dash lights, I have rear lights but no under dash. I used to could bump them and they would work but not anymore

yes,same fuse,you probably have bad connections or 2 bad bulbs

iskwezm · Aug 3, 2005

brtnstrns said:
my passenger side underdash light doesnt come on all the time...sometimes if i punch the metal part of the dash it will make it turn on...anyone know what the deal with that is?

it probably has a bad ground or connection

65up2d8 · Aug 4, 2005

iskwezm said:
yes they do and they also have hyper whites

Who are they?

iskwezm · Aug 4, 2005

65up2d8 said:
Who are they?

Ill get the brand and part number from my catalog

65mistress · Aug 5, 2005

Isk- Any luck finding those bulbs?

AE - did you find the tester?

iskwezm · Aug 6, 2005

65mistress said:
Isk- Any luck finding those bulbs?

AE - did you find the tester?

Sorry man, spent 12 hours yesterday helping the G/f buy a car,DAMN SCION tc,she changed her mind from a 05 V6 Mustang

oh,whats the bulb number,i took mine out

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