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Dash lights and High Beam Indicator
#1379128 Thu Oct 01 2020 12:48 PM
Joined: Dec 2003
Posts: 1,118
M
MikeE Offline OP
Shop Shark
I just did a 12Volt conversion on my 52 3800. I replaced all the dash lights and high beam indicator. Now I have nothing for dash lights and indicator. Is there a common ground wire in this circuit or do the lights ground through the speedometer and gauges? I Suspect that I lost the grounds by removing the sockets, but find this this a bit of a stretch given how tight they were in the openings. I have not checked the dash light connection at the light switch yet either. I am just jumping into this problem and wanted to get armed with some knowledge. I realize the indicator circuit is different than the dash light circuit.


1946 1-ton Panel
1952 1-ton Comml. W/Grain Body
My Webshots Album
Re: Dash lights and High Beam Indicator
MikeE #1379131 Thu Oct 01 2020 01:04 PM
Joined: Feb 2019
Posts: 836
P
AD Addict
The dash bulbs are grounded thru the instrument cluster. Since you lost the high beam indicator also, I suspect you lost the ground to the cluster or a ground strap to the cab. Try jumpering from a known good ground to the cluster to see of the dash lights work. If your lights work you will know where to look.


Phil

1952 Chevrolet 3100
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‘59 235 & hydraulic lifters
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Re: Dash lights and High Beam Indicator
MikeE #1379145 Thu Oct 01 2020 05:20 PM
Joined: May 2005
Posts: 7,472
B
General Purpose
Are you saying BOTH clusters have no lights? The gauge cluster AND the speedo???? From what little I know of AD, I find it hard to believe that none of the 8 cluster ear tabs are grounded. It would only take one tab on each...and the dash itself is welded. So I'm going to guess you have two problems at the same time: Power to gauge lights and something wrong with high beam circuit.

12V bulbs, right?


Watch out for careful drivers!!!
I'm away on an ego trip. Will be back on Feb 30.
I'm not an Auto Mechanic, but I play one on TV.
I charge $0.02 for every opinion and I take Paypal.
Plan B is always better than plan A, by definition.


Re: Dash lights and High Beam Indicator
MikeE #1379198 Fri Oct 02 2020 12:12 AM
Joined: Dec 2003
Posts: 1,118
M
MikeE Offline OP
Shop Shark
Yes, brand new 12V bulbs all around. I will start with the connection to the light switch and go from there for the dash lights and then the indicator.


1946 1-ton Panel
1952 1-ton Comml. W/Grain Body
My Webshots Album
Re: Dash lights and High Beam Indicator
MikeE #1379206 Fri Oct 02 2020 01:31 AM
Joined: May 2005
Posts: 7,472
B
General Purpose
So the YES is BOTH clusters dark?


Watch out for careful drivers!!!
I'm away on an ego trip. Will be back on Feb 30.
I'm not an Auto Mechanic, but I play one on TV.
I charge $0.02 for every opinion and I take Paypal.
Plan B is always better than plan A, by definition.


Re: Dash lights and High Beam Indicator
MikeE #1379244 Fri Oct 02 2020 11:55 AM
Joined: Dec 2003
Posts: 1,118
M
MikeE Offline OP
Shop Shark
Yes, both clusters. I won't be able to get out to where it is stored before tomorrow. Maybe longer, the barn owner's wife tested positive for covid. I think I am going to be a contender for the longest truck repair in history.


1946 1-ton Panel
1952 1-ton Comml. W/Grain Body
My Webshots Album
Re: Dash lights and High Beam Indicator
MikeE #1379302 Fri Oct 02 2020 08:31 PM
Joined: May 2005
Posts: 7,472
B
General Purpose
Just be safe.


Watch out for careful drivers!!!
I'm away on an ego trip. Will be back on Feb 30.
I'm not an Auto Mechanic, but I play one on TV.
I charge $0.02 for every opinion and I take Paypal.
Plan B is always better than plan A, by definition.



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