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the amp gauge only shows the current in and out of the battery (excluding starter current).
So if you are running 100 amps worth of lights, radio etc that does not go through the gauge (IF the altenator is working)
I have been thinking similair, but more towards a "smaller" span gauge since battery charging is normally less than 20 amps. (and Limiting current draw prior to running)
I always recommend to get a Volt Meter which is a much more useful Instrument. It tells you the condition of your electrical system. Just join the 2 connectors from the Amp Meter by attaching both of them to the + on a Volt Meter.
As suggested if you use a Shunt as a Jumper between the 2 connectors the only thing that will happen is that your Amp Meter becomes even more useless as it now stops showing the load on the Alternator too.
Btw to answer your question the OE Amp Meter will probably be able to handle your upgraded Alternator on a normal day. Just be aware that because of your upgrade the Alternator has the ability of a much higher output and it can potentially send 100 Amp through the Amp Meter under certain circumstances i.e. if you Battery was completely drained and you switch a lot of stuff on. That could become an issue!
Nevertheless I am still recommending to use a Volt Meter as it provides useful info as opposed to the Amp Gauge.
quote:Just join the 2 connectors from the Amp Meter by attaching both of them to the + on a Volt Meter.
If you do that, the voltmeter will be electrically hot all of the time (even with the key off), eventually draining the battery. The Cobra guys (and a few others) found this out the hard way.
quote:Sorry about this confusion
Not a problem. Just didn't want someone to end up with a dead battery.
quote:Originally posted by goodroc:
hmmmm, now I had to rewind my memory back 3 Years and yes I did in fact I did combine the 2 Connectors but I took the Source for the Volt Meter from a Switched + on the Harness..... Sorry about this confusion (mine)
I too installed a volt meter that was a close match to the Veglia gauges. The two connectors were joined on a small bolt with nut and jam nut. Be sure to insulate well the nuts and bolt. You do not want a piece of electrical tape to fall off from the heat and expose the connection. Grab a switched 12 volt wire and splice to the volt meter. DO NOT use the connections from the AMP meter.
JB05177- Thank you so much for the simplified ampmeter electrical drawing posted above. I am in the middle of the last of extensive rewiring upgrades to 6997 and have had a few commissioning isolation gremlins - I think this simplified diagram has pointed me in the right direction to sort one of them out. Most appreciated.
Note to self - don't take a fully disassembled wiring harness , perform every upgrade known to man or beast and expect it to work first time .....!