Amp Gauge question...
Thread Starter
|
Junior User
Joined: Sep 2006
Posts: 54
Likes: 0
Amp Gauge question...
I have the full gauge cluster in my 77 and the charge/discharge gauge never seems to move. How can I tell if it is working correctly. all the other gauges work fine. I thought if I put a draw on the battery, such as lights on, without the engine running, the gauge should show a neg charge, but I get nothing. Could it just be the gauge bad, or a wiring problem somewhere? Thanks
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
Honestly, this behavior is normal. That's how they all work. They're pretty useless. You would exect to see a slight deflection with the engine off and lights on, but as wiring ages and resistances increase slightly, you may not see it.
An aftermarket voltmeter is a much more useful indicator of your charging system's behavior, if you're interested in going that route. An ammeter isn't entirely useful because it only gives relative measurements.
An aftermarket voltmeter is a much more useful indicator of your charging system's behavior, if you're interested in going that route. An ammeter isn't entirely useful because it only gives relative measurements.
Post Fiend
Joined: Apr 2008
Posts: 8,261
Likes: 15
From: Big Sky Country
Like FMC said, it's "normal" for this particular gauge to have virtually no movement, Ford issued a TSB on this many moons ago...
Ford Ammeter Gauges: Do They Work? | MILEPOSTS Garage (Tech Tips)
Ford Ammeter Gauges: Do They Work? | MILEPOSTS Garage (Tech Tips)
Thread
Thread Starter
Forum
Replies
Last Post
