Ford Fender Mounted Starter Solenoid Wiring Diagram
08-24-2017,01:43 AM #1
Mini Starter wiring question - How to simplify/eliminate the fender mount solenenoid
Since I am in the middle of replacing wire harnesses, my engine/trans are out, and I'm pulling, replacing, and relooming some harnesses, I figure now is the best time to change over to wiring that eliminates the fender mounted starter solenoid, and simplifies the starter circuit to run the mini starter that has the solenoid built into it.I have looked at a number of threads on similar subjects, but most find a way to make the mini starter work with the existing wiring and fender mounted solenoid.
Does anyone have a wiring diagram or easy DIY on how to clean things up?
08-24-2017,04:24 AM #2
The fuseable links all need to be wired to the positive of the battery. So does the thick wire for the starter. The small trigger wire can be moved from the trigger post of the starter solenoid on the fender, directly to the mini starter trigger wire. Obviously all grounds need to go either to the engine or negetive cable, thats pretty much it.Id have the time of my life re-wiring a whole car and gutting a harness. I have had my mini starter on 3 different cars now, i leave the fender solenoid just so i don't have to re route everything under the hood and so that i can still use wiring diagrams. My efi cougar/birds essentially use the same engine wiring as a mustang, but have a completely different chassi and interior setup. If you are gutting the car or eliminating a bunch of stuff, you can make it look really clean pretty easy.
2 1986 cougars (both 4 eyed and 5.0)
1 1987 cougar
08-24-2017,04:08 PM #7
I can make a quick video tomorrow.The cougar birds have quite a few more fuseable links, tons of power options standard.
2 1986 cougars (both 4 eyed and 5.0)
1 1987 cougar
08-25-2017,03:24 AM #12
Long story short, the mini starter has a solenoid built in. It is identical in operation to the stock fender well, just a bit smaller. Wiring straight to the starter Trigger with a 16 or 18 guage wire is how these cars were stock.However,...
The starter solenoid is basically two electro magnets. One makes contact for the actual starter, the other just keeps it in place. For about 50ms it pulls anywhere from 25-60amps depending on how exact your measuring equipment and refresh rate is. After that, it pulls around 10 amps. To protect the ignition switch from this quick load spike on initiation, oems now add relays.
Basically, there is nothing wrong with just splicing it to the factory wire, thats how ford did it to begin with. But to technically do it "right" (right being defined as how modern cars with a butt load of electronic goodies) you could add a relay, upsize the wire, or wiring in your own trigger button off a fused curcuit, to protect the ignition switch.
My own honest opinion, its up to you. Id just splice the wire personally. Oems usually don't spend money if they don't have to though, so I'd say it would technically be better to add a relay.
2 1986 cougars (both 4 eyed and 5.0)
1 1987 cougar
08-25-2017,08:46 AM #13
Here is the Ford wiring diagram that comes with the mini starter when doing the conversion.
All the aero cars with the mini starter still use the fender mounted solenoid. The wiring is not direct to the starter, just FYI.
Trey
"I Don't build it hoping for your approval! I built it because it meets mine!"
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Posted by: vaniavelk.blogspot.com
Source: http://vb.foureyedpride.com/showthread.php?181750-Mini-Starter-wiring-question-How-to-simplify-eliminate-the-fender-mount-solenenoid
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