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70 b body fuse box wiring? #791360
09/03/10 01:41 AM
09/03/10 01:41 AM
Joined: Jul 2007
Posts: 363
kentucky
R
roadrunner7020 Offline OP
enthusiast
roadrunner7020  Offline OP
enthusiast
R

Joined: Jul 2007
Posts: 363
kentucky
I have had an issue with no dash lights for quite some time now i installed a harness that was in better shape then mine still no lights. While looking around today i found out that at the fuse box at no point is the terminal which is labeled instrument and something else i forget is never hot not in the acc position not in the run and not with the key out like the taillights etc. So Im beginning wonder is there something thta makes this terminal hot that im missing I also checked it with the head lights on, no change. If anyone knows what ignites that terminal or maybe if its suppose to be that way (doubtful) that would be of great help to me. Thanks again moparts members

Re: 70 b body fuse box wiring? [Re: roadrunner7020] #791361
09/03/10 01:44 AM
09/03/10 01:44 AM
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
1_WILD_RT Offline
Management Trainee
1_WILD_RT  Offline
Management Trainee

Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
Turn the headlights on & test it.. Also the dash dimmer can effect it..

Re: 70 b body fuse box wiring? [Re: 1_WILD_RT] #791362
09/03/10 09:39 AM
09/03/10 09:39 AM
Joined: Dec 2003
Posts: 3,519
Lansing, MI
70gtx440dana Offline
master
70gtx440dana  Offline
master

Joined: Dec 2003
Posts: 3,519
Lansing, MI
I would put my $ on a bad panel dimmer switch!


70 Road Runner 383-4 4 speed FJ5 & black guts
70 Charger R/T 440-4 4 speed FJ5 & white guts
Re: 70 b body fuse box wiring? [Re: 70gtx440dana] #791363
09/03/10 03:39 PM
09/03/10 03:39 PM
Joined: Jul 2007
Posts: 363
kentucky
R
roadrunner7020 Offline OP
enthusiast
roadrunner7020  Offline OP
enthusiast
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Joined: Jul 2007
Posts: 363
kentucky
Tried it with the headlights on no change guess I'll have to buy a new dimmer and try that! Where is the best place to buy a dimmer I have like 3 in the garage all are broken.

Re: 70 b body fuse box wiring? [Re: roadrunner7020] #791364
09/03/10 03:47 PM
09/03/10 03:47 PM
Joined: Jan 2005
Posts: 1,222
okla.
O
okie Offline
pro stock
okie  Offline
pro stock
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Joined: Jan 2005
Posts: 1,222
okla.
There is a guy on Moparts in the parts section that sells them. Good Luck! Ronnie

Re: 70 b body fuse box wiring? [Re: roadrunner7020] #791365
09/05/10 07:00 PM
09/05/10 07:00 PM
Joined: Jan 2003
Posts: 5,439
So Cal
Sinitro Offline
master
Sinitro  Offline
master

Joined: Jan 2003
Posts: 5,439
So Cal
To check the dash lites, pull off the 3 terminal connector on the dimmer switch. 2 terminals (orange wires) go to the rheostadt for dimming the dash lites, the other terminal is for grounding turning ON the dome lite.

Next turn ON the headlite switch, take a voltohm meter and measure one of the orange wires you should have 12V in one of these. Turn the headlite switch ON/OFF the 12V should go OFF. If the above worked, insert a jumper lead between the 2 orange wires now you will send 12V to the dash lites and they should be working when the headlite switch is ON. The rheostadt is simply a variable series resistor to drop the 12V for dimming the dash lites.

Hope that helps..
Just my $0.02..







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