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Guest Message by DevFuse
 

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Ea71 pieced together


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13 replies to this topic

#1 superooo

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Posted 26 August 2017 - 02:56 PM

Apparently this car has been on the forum for a while, issue- the voltage regilulator is getting extremely hot, no spark, and the battery has a consistent drain, there appears to be a cooked wire from the regulator to the battery, I'm assuming there should be a fusible link between the two but the po just has jumpers from batt to starter and such, kinda at a loss as I don't know what of this is necessary to the system. Here's some pictures

#2 superooo

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Posted 26 August 2017 - 03:00 PM

Some pics of the burnt wire and coil wiring

Attached Files



#3 spicypeanut

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Posted 26 August 2017 - 03:22 PM

Sounds like there's a bunch of stuff that the previous owners installed that needs to come off. Try cleaning it up and putting it back to stock. Replace with a new fuse able link & check the fuse block inside the cab (driver side kick panel). Clean or replace the fuse block. 

 

Also, the head light circuit will most likely have a ton of resistance which will in turn overheat that fuse block. Go on ebay and find the plug and play head light relay, its something like 40-50 bucks and it will fix the head light circuit issue.



#4 superooo

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Posted 26 August 2017 - 03:59 PM

I wasn't able to find a wiring diagram for the coil in the search function, and since I didn't pull it I don't know how it goes back, it did run before the current owner replaced the battery, but they hooked it up backwards, and before I got there to troubleshoot they had torn into the coil and got a new one. Also this car has a switch for the fuel pump where the city country horn should be. Trying to get it back to where it was a week ago

#5 superooo

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Posted 26 August 2017 - 04:02 PM

Also it appear the battery drain is the oil light on the dash even when the key isn't in, I do have 12v to both sides of the coil as currently wired which is better than yesterday...

#6 superooo

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Posted 26 August 2017 - 04:42 PM

Totally spaced, it's a 79 4wd ea71 with electronic disty

#7 Subaru Scott

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Posted 26 August 2017 - 05:33 PM

I was gonna say after your first post, that it sounded like someone hooked the battery up backwards...

 

You're going to have a mess there. The ignition unit will be fried as well as the alternator and regulator most likely.

 

Easiest way out of this would be find a parts car somewhere to get a harness and components out of.



#8 superooo

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Posted 26 August 2017 - 08:44 PM

Well at least to tinker with it until a donor pops up can I get pictures of the coil wiring and the factory fusible link setup? I'm just hoping I can get it to run to move it

#9 Subaru Scott

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Posted 26 August 2017 - 11:35 PM

You will need another ignition setup at the very least to make it run. 

 

The distributor itself may be ok, but the ignition unit on the coil is toast.

 

Option 1: Find a replacement electronic ignition unit like the one you have, which is the first generation electronic.

 

2: Find a later model, 2nd generation electronic distributor, which is self-contained and doesn't have the box on the coil.

 

3: Find an older points distributor. Just be sure to get the matching coil with ballast resistor. 



#10 superooo

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Posted 27 August 2017 - 08:21 AM

By second gen you mean ea81? I have a couple here at the house I'm pretty sure are both good, thank you for the advice

#11 superooo

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Posted 27 August 2017 - 08:30 AM

That still doesn't explain why the voltage regulator us getting so hot, but I'm thinking since the fuel pump is switched on the dash I should be able to ditch the voltage regulator and do the maxima alt swap, swap the disty for an ea81, and then theoretically I shouldn't have any problems out of it right? Ior am I missing something that these components do besides the obvious

#12 superooo

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Posted 04 November 2017 - 03:22 PM

So I'm out here doing what Subaru Scott suggested and swapping out for a gen 2 disty, so if I'm deleting the box off the coil where do I connect this disty? Second, I just replaced the alt with one from my 2nd gen, what modifications do i need to make to delete the rest of the voltage regulator?

#13 superooo

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Posted 19 November 2017 - 05:58 PM

Got it running, found a beautiful write up for doing the alt and how to bypass the voltage box, then just hooked up the coil and fire! Since it has sprung a Leak in the heater core hose, to be fixed around turkey day

#14 skinny664521903

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Posted 03 December 2017 - 03:46 AM

Can i get a copy to this write up please?






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