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Quick Gauge test

11469 Views 62 Replies 4 Participants Last post by  John Strenk
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For a video, go here:

CJ Speedometer Gauge Quick Test

By: John Strenk


OK, You know what your doing. You don't need a long explanation. Just a test light. Maybe a DVM.

Automotive lighting Asphalt Automotive tire Eyewear Automotive exterior
Yellow Measuring instrument Clock Gadget Electronic device


One Warning. A poor broken ground connection or hooking up the plugs incorrectly can quickly burn up the gauges or sensors. Don't make matters worse. Double check your connections before turning your ignition key to 'ON'
Add a ground wire from the dash to the (-) negative terminal of the battery to be sure.

Step 1. Start Here

Turn key to ON. Attach your test light clip lead to a good ground.

You may want to disconnect your Ignition coil. These have been known to burn up if the key is 'ON' but the engine is not running.
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