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76 to 79 underhood wiring

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Old 10-03-2010, 09:12 PM
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76 to 79 underhood wiring

Am putting a 79 cab complete on a 76 one tom frame,the underhood wiring is differnt for the Duraspark,the 79 cab only has one of the commom female plugs for the module and a rectangle green maybe 6 pin hanging there to.I dont get it?Anybody shed some light please!!Thanks Jason
 
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Old 10-03-2010, 09:30 PM
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Pictures would help.

My advice would be to transfere the 1976 harnesses to the new cab.

Ford changed the underdash harnesses almost every single year. There are some big differences between 1976-1979
 
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Old 10-03-2010, 09:56 PM
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jeez,well we figured out everything but the module,ill get a pic tommorow night of the 79 plugs and show you thanks its bedtime
 
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Old 10-09-2010, 12:56 PM
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Got pics..Every single think hooked up but the other side of the module and another plug pic enclosed...76 and 9 take the same blue grommet module but there is only the one oval black plug from the cab which plugged into the one side of the module but there is no other black oval plug coming from cab just these green ones,is there a adapter that im missing?
Check out the pics please...had no interest in swapping the 76 harness to 79 cab because it was a birdsnest and this one is real nice..but didnt have 79 under hood harness,like i said everything is good but the ignition and the one other pic enclosed.

 
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Old 10-09-2010, 01:55 PM
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The Modules are different due to DSI/DSII

One (I) should take a brown grommet IM
and DSII should take a BLUE grommet IM

The bottom image is of the speed control connectors
 
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Old 10-09-2010, 03:21 PM
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Great info friend...last problem is:This is a external coil old style distributor..i know the 79's had the coil pack low profile dist which i dont believe they make for a FE is this problem solvable??Engine is mid 70's that had the blue duraspark

What does DSI and DSII stand for thanks again..you are a big help...Jason
 
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Old 10-09-2010, 04:35 PM
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Duraspark I
Duraspark II
Duraspark III

You were thinking of the EEC ignition with the integral IM that came out in the 80's











https://www.ford-trucks.com/forums/8...-module-3.html
 
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Old 10-09-2010, 05:05 PM
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Just an amateur here, thinking aloud. You said FE, so I'm assuming the motor is an FE from the 76? So essentially what you're doing is converting your 76 underhood stuff to a duraspark 2.

Look at the duraspark 2 schematic that steponit posted.

My 1977 F250 looks just like the duraspark 2 schematic. (it has the 460)

My (blue grommet) module has only two plastic plugs, one is a two wire plug, which connects into two wires coming from the firewall/cab, the other plug (a four wire) goes to the distributor, with one wire branching off and going to the coil.

I wonder if your FE will need a different distributor.

eom
 
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Old 10-09-2010, 09:28 PM
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You guys have been super help i will print that off..and idea what the green and gray 79 plugs are coming out the firewall?I have been working on that truck since 630am i am ready for bed.
 
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Old 10-09-2010, 09:32 PM
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...yeah im wondering to if the dist pickup coil will work with this..??
 
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Old 10-09-2010, 10:20 PM
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1976 and 1979 both have DS-II. Blue Grommet.

DS-I was 1974-1975 only. Black and Green Grommet.


...one oval black plug from the cab which plugged into the one side of the module but there is no other black oval plug coming from cab just these green ones...
That is because the other DS-II module harness is a seperate engine harness that goes to the distributor and to the coil. The other DS-II plug doesn't coonect to the cab harness. It connects to the engine harness. Which then connects the coil and distributor.

Those other wires (I cant see the colors of the wires well) are for smog controls, Ammeter wires, etc.. that are also engine compartment wires. Seperate from the main cab. Some of those plugs will remain empty due to the 1976-1979 difference.
 
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Old 10-09-2010, 10:39 PM
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Thanks so much 81..yeah i kinda got my head wrapped around it now..will see what happens i guess when we get the batt to it..thanks!!Ill let you guys know how it went..paint next week..third reserection of this truck
76 F350 Dually car 390 that runs its *** off!!C6 paid 400 bucks for it back in '01 other than the cab its been a classic Ford..keep the fluids topped off and just go forever..pics of truck in couple weeks..J
 
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