No crank, Blows Fuse: Short-to-Ground Testing

Here we go again!
This '04 Pontiac drove to the shop to get a starter interlock reprogrammed.
But now it won't start at all, and it keeps blowing fuses!
The problem is not what I expected...
This is a great example on how to quickly and efficiently track down short-to-ground issues.
Enjoy!

[@jimmachen5095]

i been a mechanic 45 years this is my specialty ,,,just want to say good job

[@rsage_]

The headlight trick was pretty brilliant. Combining that with knowing that the fuses weren't blown really narrowed down where the failure point would be. Solid work, Ivan!

[@unclemarksdiyauto]

Another great diag! You are so suited to this job. Calm and cool, you just go through the steps. I am sure the shop is so happy you were able to help.

[@Bunkysworkshop]

I think you have the best attitude with these wires. I love working on clocks and vacuums . I wish I could learn more about these cars. Great job Ivan

[@andrewshedron425]

This, in my opinion, has to be the easiest way to test for a direct short to ground. The current is only going to flow along that path. Actually even easier than a voltage stop test using the amp meter. Great job!

[@baxrok2.]

You've got a unique style Ivan. A mix of old school basics and new school high tech. It sure is fun to watch you work.

[@highroaddrifter]

Wow Ivan you have the best job in the world,good job.Drivability work is awesome.

[@halelorf]

great diagnosis Ivan!

[@cygnus58]

during 30 years in tv/small aplliiance repair, we used a 300 watt bulb in series with the AC supply. saved very many fuses over the years. excellent load application

[@unclefranj8460]

Your explanation (and logic) are easy to follow - thank you!

[@jewllake]

Wow! that smart start is a big mess. I learned something new today as in how those gizmos work. Great job in tracing down the problem.

[@p2437]

You’re badass sir. Love the positive attitude as well!!! Nice work.

[@felmar39]

nice fix Ivan , you are one of the best.

[@djb4069]

Such a talented young Man, from the UK

[@547Rick]

Nice work young man!

[@miller745]

Love watching these videos

[@EZRider1979]

My 03 S-10 had the same issue, harness rubbing on the bracket for the emergency brake assembly. Good video Ivan!

[@wysetech2000]

Extremely well done, Ivan. You always think that the problem is associated with aftermarket accessory installation but as you show not always. It took many years to chafe through that wire assuming that the fuse panel has never been removed.

[@brianmacmac1000]

That was very satisfying. thanks Moto.

[@RODALCO2007]

The lamp in series is often done for testing old tube amplifiers and TV's when no variac is available.