Swap 4.0 to Bronco II'88 need help

Alik_Melkor · Mar 6, 2014

Hi all, last weekend I put in my Ford Bronco 2 (1988) 4.0 out of Ford Explorer OHV. the engine started, but I have not worked tachometer, I do not get it to connect, can anyone tell me how it to do?
thanks for the help
PS
I speak English not good, so say easier, please

Hitchner2009 · Mar 7, 2014

i believe there is a tan/yellow wire on the 4.0 harness that you need to splice with the one that runs the tach on the 2.9. I havent dont my swap yet, i start tonight. But i have also heard there is no designated wire for the tach on the 2.9 so idk how it works. Look at the schematic!

adsm08 · Mar 7, 2014

I have done this, and my tach does work, but I cannot remember the color of the 2.9 wire. I have been looking when I have time, and I will find this answer.

Hitchner is correct about the tan/yellow wire on the 4.0 harness.

Alik_Melkor · Mar 7, 2014

thank you gues. the colour of tach i'll try to find. I've see that tan/yellow run ignition control module to PCM. just connect idm pin with tach. thanks!
excuse me for my English. if I'll have any problems in future I'll ask here

adsm08 · Mar 9, 2014

Ok, I now remember why I don't have the color of the wire for the tach in the 2.9 harness. I never found or identified that wire, I found the pin on the back of the cluster and traced it's line back along the circuit board.

Hitchner2009 · Mar 9, 2014

ALIK, what wires did you use to power the fuel pump, starter and main power? I have power to my dash and everything but the fuel pump wont turn on. I spliced Red/Lt Grn to Red/Lt Grn and Red/Lt Blue to Pink.

Alik_Melkor · Mar 10, 2014

look at the pictures:
first: fuel pump connector whith wire from 4.0 hairnes

power for ignition and PCM, you need wire, I'm just take wire in shope and connect(let's call it "handmade")

here connect handmade wire to 4.0 hairnes

use this wire to power ignition

tаke power from this connector

power for fuel pump

if you have any question i'll try to answer

Swap 4.0 to Bronco II'88 need help

Alik_Melkor

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Hitchner2009

Well-Known Member

adsm08

Senior Master Grease Monkey

Alik_Melkor

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adsm08

Senior Master Grease Monkey

Hitchner2009

Well-Known Member

Alik_Melkor

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