basic wiring for engine

[blackdawg]

Hey Guys i need some simple tips on wiring the engine i installed.the problem i have a hei distributer only have a two prong plug coming out of the fire wall.also the alternator is a different plug.any simple ideas how to convert this and also wiring for the oil senser,starter and temp sensor.is there anything i missed.

[65 on 24s]

Need more info. What motor and truck
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[1963c-10]

Brothers has the correct harness's for that conversion. I found the wiring to be much less painless to just purchase the proper harness's than try and change or repair the old ones.

[blackdawg]

1966 chevy 350 engine

[Corts60]

So you've installed an engine and didn't mark the wires before you pulled the other one, eh? Or did someone else pull the other engine?

Anyways, since your truck original didn't come with HEI, you'll need to run the positive wire that used to go to your coil to the new HEI unit. It should have power when the key is in the on and start positions. No other position should give that wire power. If I am not mistaken, on the HEI itself there are two prongs and the one closest to the firewall is for the power. The other prong is for a tach.

As for the other wires, you will more than likely have to go through a process of elimination to find out which goes where. I am sure there are plenty of wiring diagrams online for this. Good luck!

[padresag]

replace the ign wire with a staight 12 guage wire . the orig was a resistor wire and that is not used with hei
ron

[64shortbox]

Here's a link with a color coded wiring diagram showing both a points & an HEI set up.

http://67-72chevytrucks.com/vboard/s...d.php?t=378484

[MOJO1963GMC]

tag

[blackdawg]

Thanks for the tips guys.I bought the truck with no engine thats why it is a mystery.

[blackdawg]

Today the process will start,it looks like enough information off the wiring harness diagrams to complete the job.the truck previous owner had added after market guages as well.good for me just have to go one wire at a time.the 80s 350 engine i put in has hei distrubutor.I will update you guys on the progress and any problems.this will be the last step to firing the engine.still have to remove the tank and clean it out.But could disconnet the pump and gravity feed gas straight in.We will see how far i get today.

[blackdawg]

I looked at my wiring geez this isn"t going to be easy.I followed the wiring picture 1 to the alternator plugged it in.there is one wire red off the plug not sure where it goes.at the back of the alternator there is a red wire i know that goes to the postive on the starter picture two .also from the postive terminal on the battery to the the starter.negative from the battery to the engine ground.there was a black wire picture two same harness does it go to the starter ?.the other pictures are from the hei distributor picture four and five .i have two wires coming from the truck in a plug.on the engine three wires on one plug on the distrubutor and another two on the front of the distributor..

[blackdawg]

the last two pictures are from the ignition switch and the voltage regulator.the wires going from the regulator over to the alternator and starter.any help appreciated wiring is not my thing but i want to figure it out and do it myself.the easy way would be to pay my mechanic friend.that will be my last resort.

[blackdawg]

please see the post and pictures .

[protrash64]

Thats the horn relay, not a volt reg. It is used as a junction from the battery to the ignition switch. You should have a 10g wire(use red) from bat+ to the horn relay terminal. The red wire from there should go to your fuse block or ign switch; sorry, cant remember, possibly both(?). The nut/terminal on the back of the alternator needs to feed to the bat+. Usually the red wire from the plug on the side of the alt wraps back and attaches to the same terminal.

If you have all these tied together it should cause electricity to power up just about everything.

[protrash64]

Ignition switch......purple should be starter solenoid(S terminal). Pink is usual points and/or other electric such as dash/wipers/radio/etc. No clue what the green and orange do.......

[blackdawg]

thanks, i get the part about the alternator wire .any ideas on the hookup to the starter.postive terminal from the battery goes to the starter.Any ideas on the the other red wire on the plug side of the alternator.and there is the black wire see in picture two.the one with the round clip.and also need some ideas on the hei distributor.the engine is a mid 1980s 350 with hei distributor.i appreciate all you help guys the wiring is not my strong point.

[protrash64]

The 'black' wire is actually white....look closely. Dont hook it up. I think this is for an alt light on newer cars/trucks.

Starter; big ass red to big ass terminal on solenoid....purple from switch to 'S' terminal on solenoid.

You should also make sure your engine is grounded to the frame as well as the body of the truck grounded to frame.

Look at the cap on the HEI...it will say bat+ and tach. Run a switched wire to the bat+terminal.