Ever used an ignition module tester? (Page 2/2)
PatrickTRoof MAR 18, 02:34 PM

quote
Originally posted by reinhart:

Safe to say it can identify some bad ones but not all.



True. I had an ICM that would not start the car, but it tested good.
reinhart MAR 20, 05:49 AM
Anyone ever tried to repair one? What is it that fails internally? I was curious and pried the rectangular cover off a bad one but had no idea what I was looking at.
Patrick MAR 20, 07:07 PM

quote
Originally posted by reinhart:

Safe to say it can identify some bad ones but not all.



A bad ICM will often still function before it gets hot during normal use. It's doubtful these testers have enough juice to heat up a borderline ICM enough for a valid test. In my opinion, that makes these module testers next to useless... unless the ICM is perhaps heated up considerably in an oven prior to/during the test.

The funny thing is, I have one of these module testers... and I've never used it. Ever since I installed a heatsink on the underside of my distributor more than a dozen years ago, I've never had any ICM issues.

[This message has been edited by Patrick (edited 03-21-2021).]