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Author Topic: Electrical assistance please  (Read 2282 times)
Small Block
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Posts: 121

Location: Farmington, NM

« on: March 01, 2007, 12:45:04 pm »

Hi guys,

My buddy is wanting to install a Megasquirt in his car (89GT), and has voted me to do this. He wants to remove the Mass Air harness/computer alltogether.

I dont have any pesky megasquirt issues to ask here, simply questions on what factory wiring I can utilize.

With the Mass air harness removed I would like to know where I can tap into to get a 12V hot in start/run source. I would also like to use the factory fuel pump relay, where can I find the wire that grounds the relay to power up the fuel pump.

If I missed any other neccesary info please let me know, as he's wanting to do this this weekend.

93 Mustang LX Coupe
4 cylinder to 5.0 conversion
AOD to T5 conversion
Pro-M 75mm MAF, 42lb injectors. TimingLok
B&G Turbo kit, Masterpower 70mm
El Hombre
Big Block
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Posts: 22510

Location: Puerto Rico
Miracles?.... by appointment only!

« Reply #1 on: March 01, 2007, 02:05:59 pm »

1. If he's removing the EEC-IV harness, all of it.....you would need to access the remainder of the wiring harnesses (under dash and engine LH side).....you would need the details of those wiring harnesses.....the best way to get that info would be a an OEM '89 Mustang Shop Manual.

2. The wire that grounds the FP relay to turn it on, is the one located at pin 22 of the now removed ECM harness....check the diagram you'll find at http://sbftech.com/index.php/topic,40.0.html ......or use the full set of diagrams you'll find at http://sbftech.com/index.php/topic,3993.0.html



'86 Mustang GT, X-303 cam, Holley DP 700, RG Tran., 289 Heads   Ford Smilie 2

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