Fried hei module??

[hoover]

Today I decided to try to wire up an hei to a mopar distributor.

When I bench tested it there was awesome spark.

When I tested it on a truck that I'm working, on the terminal that goes to the positive coil arced to the heatsink that the unit is mounted and grounded to. Now there is no spark. I assume that the unit is fried.
I used insulated terminals. Do I need to further insulate it from the the unit from the heatsink?

 

[Geoff 2]

Yeah, probably took out the module. Check that you still have 12v, might be lucky & just blown a fuse....

 

[HALIFAXHOPS]

Sounds fried. Definitely will fry it if there was no ground also.

 

[Geoff 2]

I do not believe that is correct. If there is 'no ground', there is no return path from the [+] lead to cause a problem.

 

[hoover]

I had it grounded to the battery, maybe needs a dedicated ground to the engine?

 

[HALIFAXHOPS]

No just a ground from the battery should be fine.. I just know from testing them I have blown out a few because of power to it and a bad ground.

 

[hoover]

I picked another hei unit up.
This is my set up. Once it works I will tidy up my wiring.
When I hooked it up and tested it there was really nice spark, but a spark jumped from the coil - to the aluminum plate. Then no spark.

Aside from it not being neat and tidy, do I have something wrong?

 

[HALIFAXHOPS]

lIKE THIS?

 

[hoover]

lIKE THIS?

View attachment 1933679

Yes. With the exception that i don't have a swich and i grounded the other mounting screw.

 

[Sinitro]

Keep in mind...
The country of orgin for the HEI module....
Since Delco(USA) stop making these, the majority are coming from the Orient
with questionable quality and reliability....
Tried to use an NOS as they are still available, shop around..

Just my $0.02...