so my amp gauge does not work so i installed a new horn relay and found 1 wire that was not connected.i had the battery disconnected so i connected the wire to the relay and when i started to put the cable back on the battery there was a spark.took the wire back off and all is the way it was before,question is can a bad amp gauge short out or is it a wire problem.
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Re: amp meter question 66
Mark my wiring education is not professional status. However with the method I use to stop the drain on my 1970's battery when the car is not going to be used, I disconnect the battery positive cable at the frame connection point underneath the battery box.
When I reconnect the battery positive cable I will get a "spark". I converted my 70's clock to quartz operating system about 20 years ago and have always "assumed" the spark generated was from the required electrical power requirement of the quartz clock. The clock is the only electrical drain when my 70's ignition is off that I know of.
Removing my fuse to the clock I could verify my assumption since nothing else on my 70 should be using electrical current.
You could check out your spark by removing all your fuses. Connecting your battery and then seeing if the unattached wire will still produce a spark at the mounting location with the battery still connected.
Installing the fuses one at a time and checking the wire for a spark could help to isolate what is originating the spark. -
Re: amp meter question 66
looks black-there was a strip of 2 connections on the relay-1 pos battery and the other looked like where this wire should have went to.Amp meter does not work now or before i installed the new relay.Comment
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Re: amp meter question 66
It's not unususal to see a brief spark when you initially connect the last wire to the battery...
The car's electrical system contains a LOT of capacitance along with certain branch circuits that are un-switched. So, when the system has been disconnected and allowed to bleed itself of stored energy, there's a 'fill the pipeline' flow of current effect that's normal when you re-connect the battery.
Now, if the spark is HUGE or wires heat and begin to smoke...that's horse of a different color altogether! That's a whoa/stop warning...Comment
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Re: amp meter question 66
There was a good discussion on this back on,
Saturday, 12 February 2005, at 10:25 p.m.
But I'm unable to find via a search.
Do you have wring diagram for 66? The 65 diagram shows a 18 B/W going to Amp Meter from relay Red connection.
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Re: amp meter question 66
Mark -
There are four wires on a '66 that connect to the horn relay (on a non-A/C car). The dual plastic connector that plugs into the spades on the bottom has a 14-ga. green wire (12V to the horns) and a 20-ga. black wire (to the horn button, grounds the relay coil). The screw terminal buss has a 14-ga. red wire (main power feed) and a 20-ga. black/white wire (to the battery gauge).
An A/C car has an additional red wire with an in-line fuseholder that connects to the screw terminal buss and feeds the high blower relay.Comment
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