'72 Instrument panel lights
Thread Starter
Instructor
Joined: Jan 2002
Posts: 200
Likes: 6
From: Oak Ridge NC
'72 Instrument panel lights
'72 convertible restore. Instrument panel lights have never worked. Replaced the headlight switch while the dash was being restored. Instrument lights still do not work. INST fuse is good. Checked voltage at INST fuse with car running and headlights on. No voltage.
Looking for suggestions on where I should look next.
Thanks in advance for any/all suggestions.
Looking for suggestions on where I should look next.
Thanks in advance for any/all suggestions.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
Electrical ground for the dash lights is a wire behind the gauge bezel which connects to chassis metal in the trans tunnel console. Run a bare ended jumper wire from the chrome trim on the gauge bezel to a known good grounding point (fuse block?) and see if they light up.
Le Mans Master
Joined: Aug 2006
Posts: 7,431
Likes: 1,561
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Do you have tail lights?
The tail light fuse feeds the instrument fuse.
If the instrument fuse blows only the dash lights go out.
If the tail lamp fuse blows both the tail lights and dash lights will be out.
If the instrument fuse blows only the dash lights go out.
If the tail lamp fuse blows both the tail lights and dash lights will be out.
Thread Starter
Instructor
Joined: Jan 2002
Posts: 200
Likes: 6
From: Oak Ridge NC
All the instrument panel lights are out. Going to check ground and trace green wire that runs from headlight switch to the fuse panel.
Thread Starter
Instructor
Joined: Jan 2002
Posts: 200
Likes: 6
From: Oak Ridge NC
Electrical ground for the dash lights is a wire behind the gauge bezel which connects to chassis metal in the trans tunnel console. Run a bare ended jumper wire from the chrome trim on the gauge bezel to a known good grounding point (fuse block?) and see if they light up.
Thread Starter
Instructor
Joined: Jan 2002
Posts: 200
Likes: 6
From: Oak Ridge NC
Appreciate everyone's help. I found the problem. The ground to the instrument panel is bad. When I stated earlier that the INST fuse had no voltage I took my reading using a ground that turned out bad. This morning I ran a ground wire to the battery and checked the voltage at the INST fuse again. It has voltage. I then unplugged a bulb from the back of the tach and checked continuity from the green wire at the headlight switch to the end of the grey wire that provides power to the bulb. Continuity was good. I then took my ground wire that is connected to the battery, turned on the headlight switch, touched the ground to barb on the bulb connector and the bulb lit up. Now I have to figure out how to correctly fix the ground problem.
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