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  #21  
Old 12-16-2019, 10:42 AM
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babywag babywag is online now
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1975-1977 Jeep used a Prestolite ignition system, guessing that's what you're looking at?

It's a problematic system and many get replaced by folks.
The ignition module is a small box.

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  #22  
Old 12-16-2019, 11:00 AM
ClassicQueen ClassicQueen is offline
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Thank you for your response. I’m actually going by ‘74 diagram but there s this one wire I cannot ID so I cross referenced to ‘76 diagram. But my best guess is that the wire goes to vacuum solenoid or prestolite ig system.
If prestolite is problematic do I just bypass it or replace it. The truck does not have the prestolite
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  #23  
Old 12-16-2019, 12:05 PM
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tgreese tgreese is offline
 
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There are differences between years. No guarantee that the '75 wiring or electrical equipment will be the same as the '74 or '76 diagram or equipment.

1974 used a points (mechanical) ignition and '75 has the Prestolite electronic ignition. Again, I urge you to get the proper year of TSM and follow it. Without the right TSM, you need extra insight which a novice lacks to understand the changes in equipment and wiring.

Pretty sure a '76 with a 258 will have the Delco alternator with an integral regulator. '75 will either have the Motorola or Motorcraft alternator I believe. This will change the wiring. There were changes every year, and this makes the wiring different. Again, the proper manual will help you.

If not the Prestolite ignition, then likely it was converted or came with the Delco points ignition. Prestolite is correct for 1975.
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Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS, hubcaps.
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  #24  
Old 12-23-2019, 10:15 AM
ClassicQueen ClassicQueen is offline
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Just got manual for 1975 and it is the same as 1976. The ignition control has been completely removed, with that being said do i need it?
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  #25  
Old 12-23-2019, 11:57 AM
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The only way you would need the old prestolite wiring or module is if you have a prestolite distributor in use.
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  #26  
Old 12-24-2019, 08:18 AM
rocklaurence rocklaurence is offline
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The ECU that your referring to maybe the Spark module?
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  #27  
Old 01-03-2020, 01:28 PM
ClassicQueen ClassicQueen is offline
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Just finishing up going thru interior harness. System has a Delco remy coil. Dimmer switch connectors were toasted both switch and connectors i was able to replace. Now thru my research I ve found that amp meter has been a source of problems and I
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  #28  
Old 01-04-2020, 03:04 AM
fsj454 fsj454 is offline
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1975

You can polish a turd but it is still a turd. Why would you spend time and money on something that is junk . Hope you carry a fire extinguisher. Sorry but that is my 2 cents
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  #29  
Old 01-04-2020, 08:39 PM
ClassicQueen ClassicQueen is offline
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Quote:
Originally Posted by fsj454
You can polish a turd but it is still a turd. Why would you spend time and money on something that is junk . Hope you carry a fire extinguisher. Sorry but that is my 2 cents

What
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  #30  
Old 01-04-2020, 08:39 PM
ClassicQueen ClassicQueen is offline
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Quote:
Originally Posted by fsj454
You can polish a turd but it is still a turd. Why would you spend time and money on something that is junk . Hope you carry a fire extinguisher. Sorry but that is my 2 cents

What s your reasoning behind that? Because I’m restoring it?
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  #31  
Old 01-05-2020, 08:53 AM
fsj454 fsj454 is offline
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Sometimes

Sometimes parts and pieces must be replaced not rebuilt that's all I am trying to say . Sorry if you took it the wrong way... If I can help PM me
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1982 cherokee nt. 454. nv4500 .205. dana 60 f+r. twin stick.hydroboost.hydrolic clutch.rock ram.traction bar.warn 12000 winch.4 wheel disc.flip kit.soa.high steer.cross over steer.4.56 detroit locker.35 spline rear alloy axles. 37s .1990 grand wagoneer aka trusty rusty
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  #32  
Old 01-07-2020, 12:26 AM
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Tigger4X Tigger4X is offline
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TSM on Ol Jeep and wiring harness from BJs Off Road should have you good to go. There are posts on here to do a better wiring harness that upgrade the headlight system. I did it and would do it all again.
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  #33  
Old 01-19-2020, 08:37 AM
ClassicQueen ClassicQueen is offline
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Hack truck

learning a lot about this truck, which originally had a 401, but at some point a 1971 360 was put in. The steering column is also not original and very poorly installed. Distributor is Petronix distributor cap and rotor, motorola alternator.
Given this mix and match is hard to figure out ignition wiring, which year engine wiring should i go by I've reinstalled a voltage regulator all wires of it got a proper connection except for 41 gray to alternator i cant seem to find a terminal for it.
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  #34  
Old 01-20-2020, 10:13 AM
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rang-a-stang rang-a-stang is offline
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Focus on one thing at a time.

Do you think it would be better to bail on this rig and start on another but use this one for parts?

If not, 401 and 360 are almost identical externally and electrically. Ignition and charging wiring was the same between 401 and 360 so treat it the same.
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