Inertia switch bad?

[Vstromvoyager]

Long story short, driving my 88 B2 to the mechanic to have a new exhaust installed and the truck stopped running and wouldn’t restart. Towed it to the shop and he said he would check It out after the exhaust. He gave me a call and said the inertia switch was bad. He knew I liked to work on it myself so he bypassed the switch so I could install a replacement. I pulled the switch and out of curiosity I checked it with an ohm meter. It tested good, or I should say it had continuity. I put it back in and it wouldn’t start. Put the jumper back in and it ran fine. My question, finally, is why does it appear to test good? Am I testing it wrong? Anyone with an answer I would greatly appreciate it.

 

[wildbill23c]

Those switches have a magnet in them if I recall, and over the years they get quite finicky and will cut off at random times, my 88 Bronco 2 had the same issue, installed a new switch and has been fine ever sense. The switch can easily be triggered by simply hitting a rough spot in the road, railroad tracks, etc. I just bought a generic inertia switch off ebay and it has been working just fine for over a year now.