Electrical testing after rewire...

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jonny8
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Electrical testing after rewire...

Post by jonny8 » Sun Feb 17, 2019 7:31 pm

Just to summarize the adventures I have been having.

First. Battery strap broke, shorting out the engine compartment. New harness needed, alternator and regulator.

Second: I fitted the battery back to front, so when I tested, I blew the cockpit hardness and Ammeter.

So, I have a two new harnesses, new ammeter etc. I was super careful to label everything as I took it apart and put it together the same way.

Now, before the car is blown up a third time... what a reasonable testing plan so that I can verify

a) I have not crossed a connection causing another burn out
b) I will not blow the ammeter when its in the circuit
c) Any of the other components have not been fried (various voltage regulators, resistors etc.)

Any wisdom greatly accepted, including don't make those mistakes again!

Thanks

-Alvin
1965 Roadster 1600

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Nissanman
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Re: Electrical testing after rewire...

Post by Nissanman » Sun Feb 17, 2019 8:02 pm

Connect a headlamp globe or some other high wattage globe in series with the battery negative post and the battery cable. Any shorts will illuminate the globe but not cause dangerous current to flow. The test lamp won't allow you to crank the engine but if a high enough wattage it will allow you to test your switches and harness OK.
If you followed your labeling and referred to the schematic for any queries then shorts may not be an issue but opens might be if connectors and pushed home completely.
I used carbon grease on all of my contacts to assist in making good contact. It is conductive so don't spread it all over, just a smear on the metal contacts is sufficient.



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C.Costine
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Re: Electrical testing after rewire...

Post by C.Costine » Sun Feb 17, 2019 8:19 pm

You could test it in segments. I powered my dash up with a lawn and garden tractor battery to test just the lights, including the map light. Doing segments you don't have to be trying to watch everything at once and worrying about doing a lot of damage at once.

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nismou20
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Re: Electrical testing after rewire...

Post by nismou20 » Sun Feb 17, 2019 8:34 pm

Might add a 30 amp fuse inline before the Amp gauge now. Many have sacrificed a amp gauge as a fuse!

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Curtis
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Re: Electrical testing after rewire...

Post by Curtis » Mon Feb 18, 2019 11:47 am

Will these help? Ignore most of the wire gauge call outs, I need to fix them.

http://www.kendo-usa.org/datsun/datsun_ ... _66_67.pdf

http://www.kendo-usa.org/datsun/datsun_ ... _66_67.pdf
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Re: Electrical testing after rewire...

Post by jonny8 » Mon Feb 18, 2019 7:48 pm

@curtis

Yup - found those on the Tech Wiki and checking off. I also found your Fuse Block diagram for 1966-67... the only difference I have is there i no Yellow gauge wire from the harness into the fuse box as indicated. I need to check the other diagrams for this wire... but I certainly don't have one!

-Alvin
1965 Roadster 1600

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jonny8
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Re: Electrical testing after rewire...

Post by jonny8 » Mon Feb 18, 2019 7:50 pm

nismou20 wrote:
Sun Feb 17, 2019 8:34 pm
Might add a 30 amp fuse inline before the Amp gauge now. Many have sacrificed a amp gauge as a fuse!
Add me to that list :-(
1965 Roadster 1600

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Curtis
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Re: Electrical testing after rewire...

Post by Curtis » Mon Feb 18, 2019 8:19 pm

jonny8 wrote:
Mon Feb 18, 2019 7:48 pm
@curtis

Yup - found those on the Tech Wiki and checking off. I also found your Fuse Block diagram for 1966-67... the only difference I have is there i no Yellow gauge wire from the harness into the fuse box as indicated. I need to check the other diagrams for this wire... but I certainly don't have one!

-Alvin
The yellow wire is spliced on in the dash harness. You're welcome to take all the tape off your nice new harness if you want to see it.
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Curtis
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Re: Electrical testing after rewire...

Post by Curtis » Mon Feb 18, 2019 9:59 pm

66 stroker
67 basket case, the renewal has begun.

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jonny8
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Re: Electrical testing after rewire...

Post by jonny8 » Tue Feb 19, 2019 12:28 am

Curtis wrote:
Mon Feb 18, 2019 8:19 pm
jonny8 wrote:
Mon Feb 18, 2019 7:48 pm
@curtis

Yup - found those on the Tech Wiki and checking off. I also found your Fuse Block diagram for 1966-67... the only difference I have is there i no Yellow gauge wire from the harness into the fuse box as indicated. I need to check the other diagrams for this wire... but I certainly don't have one!

-Alvin
The yellow wire is spliced on in the dash harness. You're welcome to take all the tape off your nice new harness if you want to see it.
I liked your updated diagram much better than removing tape!
1965 Roadster 1600

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Mackn367
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Re: Electrical testing after rewire...

Post by Mackn367 » Tue Feb 19, 2019 4:20 pm

+ 1 on adding amp fuse. They are pretty cheap and definitely a lot easier to replace than any other part. Sorry that happened to you ughh... oh and do you have a voltage regulator/tester? That might help in the future too for electrical testing.
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Linda
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Re: Electrical testing after rewire...

Post by Linda » Thu Feb 21, 2019 11:35 pm

Nissanman, Does carbon grease reduce carbon tracking in a distributor? I am going to try to find some for connections like you recommended.
Linda
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Tech Wiki->Parts->Parts Interchange
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Nissanman
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Re: Electrical testing after rewire...

Post by Nissanman » Fri Feb 22, 2019 12:00 am

No, carbon grease is a conductive lubricant, not suited to that purpose.
I used it to make sure all my 50+ Y.O. connectors did indeed connect :shock: :shock:

If the distributor cap is tracking internally I would try a wax and grease remover or renew the cap.
Nissanman, just trying to help.
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