I believe the theory is voltage drop reduces the force it activates with so doesn't make the contact convincingly. Presumably this in turn burns the contacts making the resistance even higher.

Could be wrong, but thought it was worth a try, and if it increases the time before I need to do the starter again then worthwhile leaving it on

Last edited by RovingCanary on 27th Sep 2024 8:59pm. Edited 1 time in total

Low voltage and low current is due to inadequate gauge wiring and will cause the contacts to not be closed with the force required to prevent excessive burning which eventually leads to carbon build-up on the contacts resulting in no power to the starter motor.

You are correct James., I added the wire & it did not resolve the problem so I removed, stripped & cleaned the starter motor solenoid contacts that were badly pitted & its been no problem every since.

The bypass wire cannot fix burnt contacts, it is purely preventative.