can't remember

[68impalass]

I for the life of me cannot remember if the voltage gauge always reads even with the key off. If it's supposed to stop reading does anyone know where to start looking? I appreciate the help very much.

 

[dependable]

It should only read when key is on. You could start by checking that ignition switch actually goes to off position. The switch itself is down on the steering column. It is actuated by a metal rod that is pushed by the ignition key. Check for jammed rod or out of adjustment switch.

 

[Barrman]

As posted above, it comes off and on with the key. However, you should be aware that 24 volts is present at the back of the gauge at all times. Such as when you pull the gauge cover and one of the gauge post hits metal. That is when you hope the very bottom fuse in the panel blows before any wires let the magic smoke out.

 

[twomorestrokes]

If it shows in the green when the alternators are not turning, I'd suspect the gauge itself.

 

[cpf240]

As I recall it, that gauge is switched on and off by a relay mounted next to the starter and GEN 2 relays under the dash. This relay should activate when the key is on.

Now, I don't understand why it was done this way, but that relay switches the *ground* connection to that gauge. So, as others have noted, there is *always* 24v hot on the back of the gauge.

If that gauge finds another path to a ground, such as if another gauge was installed next to it, it will be "on" all the time.

Of course, the needle could also just be stuck.

 

[davidkroberts]

There are two things you should never put too much trust in... loose women and military gauges.... that is all carry on

 

[sierrajcharlie]

As posted above, it comes off and on with the key. However, you should be aware that 24 volts is present at the back of the gauge at all times. Such as when you pull the gauge cover and one of the gauge post hits metal. That is when you hope the very bottom fuse in the panel blows before any wires let the magic smoke out.

I thought I was the only one who knew about that! Now I wonder if anyone else knows about the other secret magic smokes I've let escape!

 

[Recovry4x4]

It would be of benefit for those willing to search to have the topic of the thread in the title.

 

[Barrman]

Magic smoke release has been part of my life since before I could drive. Starting with British cars. The CUCV's are simple and easy in comparison. At least normally, a CUCV wire will actually go from point A to point B without 5 or 6 non insulated metal connections, the wires are covered in something besides rotted cloth and the wiring diagram actually applies to the vehicle you are working on 90% of the time or more.