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irbob
08-10-2002, 02:51 PM
Dinner time so I get to read the forum. :D

Traced it down today and removed donor wires from parts rig to try and correct some problems. I have to rev the engine to energise the
alt then it will charge. A mech bud of mine did that so it would shut off. Now I want to get the wiring right for Ouray...well and for myself. I have been in a spegetti wire mess for that past several hours but there is light at the end of the tunnal. Plus with this isolator it won't energise at all so another incentive exists.

Come to find out that this resistor wire is pretty important. The diagram shows it as a brown wire from the fire wall to the alt. but that's not the case. It's a red w/grn (it says "resistor wire do not cut" on it) wire spliced to the red w/wht at the ignition module, that wire stops at a splice and turns into 2 red and a brown (another resistance wire), one red goes to the coil and the other goes to the starter solenoid, the brown one goes to the starter.

A question: If I wanted to get a full 12v to my TFI coil would I have to replace the resitor wire with a regular type of wire?

It's a good thing that I was down in all those wires cuz I found that both of my heater hoses were cut so bad I don't understand why they weren't leaking. I replaced them just in time I think.

I have many other pix of the dual batt install bt since I will be at it until midnight I may not have time to post them until maybe tomorrow. Thanks for letting me talk your ears off. smile.gif

Updade: fixed my error, the resistor wire color is red w/grn instead of red w/wht.

[ August 11, 2002, 11:21 AM: Message edited by: irbob ]

mccullough_89_GW
08-10-2002, 05:21 PM
my understanding is the ford system is NOT to have over 12volt at the coil...the resistor wire eats some of the voltage for that reason...+ the voltage running in the wiring cruising should and probably is over 12 volt...
my resistor wiring runs from the ignition wires(key to the ignition module splice) Yellow to the ressistor wire to a splice between the starter relay(on the fenderwell) and the coil....

Mine is wired as the to 91 TSM specs, and the haYnes specs for A 89' up...

I don't know if I helped anything, but.....02

kel

my 88 mustang is the same wiring (for the most part)

Tourettes
08-10-2002, 05:32 PM
does the dual battery settup affect total whell well space? could the wheel ever hit it??
wondering

shadowfax101
08-11-2002, 01:33 AM
You know that my alternator does that same thing. I have to step on the gas at start up to get it to charge. I am sure I messed up something in the wiring when I was fixing the PO's mess. If you find a way of fixing it pass it on to me..thanks

joe
08-11-2002, 01:45 AM
Originally posted by shadowfax101:
I have to step on the gas at start up to get it to charge. Not sure if this applies to you but some alts have an exciter wire that lights up the alt. It's usually(I think) from the oil press sender unit. I don't remember if it's just a function of waiting till the press builds up and activates the sending unit(longer wait period on an old tired lo press motor) before it sends juice to the alt or if cleaning up the connection helps. Never hurts to insure clean connections though. It might be something to try.

coolram
08-11-2002, 02:20 AM
My alt does the same thing.I'm working thru my harness checking and cleaning when I have time.The excitor wire does make sense.I've been contemplating removing the resisitor wire since I'm using a 12vdc coil.

irbob
08-11-2002, 05:00 AM
mccullough_89_GW...I just went through and set my wireing back to OEM specs. Per the drawings anyway. The resistor wire now has 15.0 ohm resistance just like the drawing. It was 5.0 before and wasn't hooked up the the alt. My parts rig had everything I needed to get it back to OEM.

Tourettes...my wheel will never hit it. With my setup the tire would have to travel 13 inches to hit the battery box. My shocks will only allow 6.5 inches of upward travel. The box drops down 5.25" into the wheel well. Hope that helps.

shadowfax101...I see I'm not alone. I'll let you know if I fix it.

-joe...clean connections are good to have. I remember something about a diode that goes bad in the alt. I will have to check into that. I believe it's RPM's that excite these alt's.

coolram...looks like we're not alone.