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Interestingly, I found through a military parts source website, the same relay specified with a 6 Ohm coil!
5945-01-192-8653, 5945011928653, 14076885, 1759100, 974-1215-010-09, 98226 Data. Get Quote & Buy
The original relay coil spec is, WINDING DC RESISTANCE RATING 6.0 OHMS NOMINAL SINGLE WINDING
The -20TM says, 6-10 ohms between wires. If resistance is light blue at not correct, replace glow plug relay.
So, I would expect the GP controller should have been designed for that.
The original...
I have used 8 ga wire for my jumper (and recommend that to others).
My question is, is the red wire that goes to the 12v junction stud(and its fusible link) adequate for the additional load when tapped for 12v supply to the GP relay.
I have always been sure to NOT have my lights or any other...
Also, my next concern is the wire size and fusible link capacity on the 12v wire that supplies the truck(when adding the GP load to it).
I personally have had no issues with a new short jumper wire(drawing off the 12v circuit).
So, in reference to post# 19. It is safe to say, the difference when resupplying to 12 volts is, you double the amp load on the front battery and eliminate all load on the rear battery (even though the amp load of the system is reduced slightly).
The part number in the -20P is 14076847 (for 1 resistor on the firewall).
4 PAOZZ 11862 14076847 RESISTOR,FIXED,WIRE qty2
Here's a link to a parts quote with the specifications.
http://www.ctg123.com/rapid-quote-system/request/?p=14076847
What I was attempting to do originally was...
Ok, putting this in text, has me very confused. These are the numbers I came up with, but I am having a hard time believing them. I thought there was around 40 amps drawn by the stock GP system. Where did I go wrong here?
The 2 resistors on the fire wall are .280 ohm(each). Wired in...
Sure looks correct.
To be sure it is, use an ohm meter and check for continuty between either of the 2 small studs, to the mount. There should be none.
I did not notice anywhere in this thread, it mention the relay needs to have an isolated ground on the coil. The pictures of his relay, have me slightly concerned that, that may not be the correct relay. I suggest you test it before you use a GP controller card(or you could damage it).
The 12V terminal(stud) and the wiring and fusible link feeding it, is adequate for the task(supplying the GP relay with 12v). Many of us have done this, with no problems(long term).
btw, your thoughts on load on the bats is incorrect. But we don't need to go there.