Can anyone tell me what wires these are and if I need them ?

[84Longbed]

Truck came with a 305/700r4, someone put a 350/350 combo in it before I got it, now I have a handful or wires that arent hooked up. If anyone can help me identify them, id be very grateful. Ill start with the driver side, then on to the passenger. Here goes

[84Longbed]

Second set

[truckdude239]

what year is the truck i see several connectors for the 700r4, frist picture is the oil pressure connectors, picture 2 is a ground i believe, picture 5 are the connectors for the 700r4 trans.

second post
picture 5 is the knock sesnor for the computer control timing

picture 6 is the starter signal wire and the flat 4 pin is for the computer controled eec knock senor module.



looks like the truck was a 305/700r4 with throttle body injection and someone swaped it over to a 350/350 carbed motor.

[truckdude239]

last picturee looks lieka vacuum line for the tran mod

[cableguy0]

Looks a lot like that truck was originally fuel injected. I see a knock sensor plug along with some other sensor plugs. You wont be using any of them with the carbureted motor.

[84Longbed]

Aright last set I promise

The truck is an 84, and it did come with the 305/700r4 but was converted to a carbed 350/350. Im not sure if it was fuel injected as Ive seen 86 models that still had carburetors but Im no expert on the matter
The vacuum line that comes out of the firewall cant be for the trans modulator, I have that running from the modulator to a port in the intake
And regarding the oil pressure connector, I already have one hooked up, its a single pin. am I using the wrong one or is it possible there are two?
But anyway, can I remove the above mentioned wires with no issure?
Thanks for the help so far

[truckdude239]

picture 1 is the electiran spark control module,

picture 2 is looks like it goes to the havc under the dash

[michael bustamante]

Is that a golf tee? Lol. Yup looks like it was fuel inj. Origionally. With a 700r4

[84Longbed]

Haha yea that is a golf tee, got it for free when i bought the truck. It had to be fuel injected with all the extra wires I have laying around. If i buy a haynes manual for the 73-87 will it show what all those wires are?
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[truckdude239]

got to thinking more about this i wonder if this truck had the 6.2 diesel in it witht eh THM400/425/475 with lock up in it

[motornut]

what i see is center valve covers= newer block

to plugs white four hole plug= for 400 tranny

green wire half melted plug =temp wire

two plugs in hand=big with two holes-oil sensor by filter-may work choke too

firewall air line by tranny dipstick =feed for heater controls -should come threw over air box inside behind glove box,run to contols

golf tee line maybe for cruise control vac

[truckdude239]

motor thats what i was thinking everything pointed to fuel injection but they didn;t offer gas fuel injection factory till 87 unless it was diesel

[WAAF]

Originally Posted by truckdude239

motor thats what i was thinking everything pointed to fuel injection but they didn;t offer gas fuel injection factory till 87 unless it was diesel

think the power booster, x's the diesel..

[motornut]

?.Is the harness from the truck or the block or even just a donor
Pull it off at the firewall , checking the connections meet for stuff
They come in different spots for fi or carb,would help you decide
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[84Longbed]

The harness is the original from the 84 cab. I removed the wires coming through the passenger side firewall and took out the transmission computer thing, unhooked the wires and vacuum tubes from the two unnecessary sensors (one of them was the line with the golf tee. Took the aftermarket water temp gauge out and hooked up the green wire to a new stock sensor. Now that its running i have the dash pad taken back out and i might try to remove the other wires coming through the firewall that arent attached. Is that a bad idea?

[84Longbed]

So can I remove all that junk except the temp wire and the oil pressure wire or will I run into problems