1976 CJ5 Instrument Cluster Lights not working even with 12 volts - JeepForum.com
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post #1 of 6 Old 04-14-2019, 05:10 PM Thread Starter
Mgoodrich26
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1976 CJ5 Instrument Cluster Lights not working even with 12 volts

Hello, Brand new to the forum as I just purchased the Jeep. This site has been so helpful to me. When I bought the Jeep only the headlights, hazards and taillights worked. No guage lights, blinkers or anything on the instrument cluster worked. I bought a new headlight switch and ran multiple grounds to the dashboard and now everything seems to work except the bulbs that fit in the instrument cluster. When I test inside the light bulb socket I get 12volts but when I put the new bulb I purchased in it does not work. Any ideas? Thanks for the help!

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post #2 of 6 Old 04-15-2019, 06:02 AM
jeepdaddy2000
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The bulb needs to be in the socket and the socket needs to be installed in the speedo or grounded in order to work.


12V to the socket, the contacts are clean and the socket is grounded, No light after that you need to check your bulb.

“You're short on ears and long on mouth.”

John Wayne
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post #3 of 6 Old 04-15-2019, 03:24 PM Thread Starter
Mgoodrich26
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Thanks! That seemed to help. Not all working but a good start.
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post #4 of 6 Old 04-16-2019, 08:50 AM
bob4703
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Welcome. You have encountered a problem we all have or will encounter. Your first step in solving any problem is to go here and download the TSM for your Jeep http://oljeep.com/edge_76_tsm.html

If you don't have one get a digital multimeter. Walmart sells them for $20 or less. Next to a 1/2" and 9/16 " offset box end combination wrench it is my most used tool.

Disconnect the battery.

Unless you have an extra elbow or two, Xray vision, and can rotate your head a full 360* you are going to need to remove your dash or move it forward enough to see the gauges and speedometer cluster.

Pull the lights out and use contact cleaner on the inside and clean the grounding points both on the gauge and light with sand paper. The gauges ground through the dash and a ground wire directly to the gauge works better. Using a multimeter check the power continuity to each light just like you would check a ground. Disconnect the battery--second reminder, turn on the light switch and turn all the way counterclockwise. Touch one lead to the the power input wire to the light switch and the second to the contact in the light. My meter gives an audible tone there is continuity.

Parts stores sell bulbs in packs of 10 or 12 and may be cheaper than the blister card with only two bulbs. You have to ask for them. Change all the bulbs at the same time.

Now if you do all this you may get most of the lights burning. Good luck!

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post #5 of 6 Old 04-16-2019, 08:51 AM
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Sorry

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Last edited by bob4703; 04-16-2019 at 08:53 AM. Reason: Double bump
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post #6 of 6 Old 04-16-2019, 01:03 PM Thread Starter
Mgoodrich26
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Quote:
Originally Posted by bob4703 View Post
Welcome. You have encountered a problem we all have or will encounter. Your first step in solving any problem is to go here and download the TSM for your Jeep http://oljeep.com/edge_76_tsm.html

If you don't have one get a digital multimeter. Walmart sells them for $20 or less. Next to a 1/2" and 9/16 " offset box end combination wrench it is my most used tool.

Disconnect the battery.

Unless you have an extra elbow or two, Xray vision, and can rotate your head a full 360* you are going to need to remove your dash or move it forward enough to see the gauges and speedometer cluster.

Pull the lights out and use contact cleaner on the inside and clean the grounding points both on the gauge and light with sand paper. The gauges ground through the dash and a ground wire directly to the gauge works better. Using a multimeter check the power continuity to each light just like you would check a ground. Disconnect the battery--second reminder, turn on the light switch and turn all the way counterclockwise. Touch one lead to the the power input wire to the light switch and the second to the contact in the light. My meter gives an audible tone there is continuity.

Parts stores sell bulbs in packs of 10 or 12 and may be cheaper than the blister card with only two bulbs. You have to ask for them. Change all the bulbs at the same time.

Now if you do all this you may get most of the lights burning. Good luck!

Thanks Bob! Very helpful
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