Originally Posted by SunBear
There are couple of fuses in the VIM, but they tend to be trouble-free.
That may be true but there are 6 relays in the Allison VIM... which are definitely NOT "trouble free".
In '09, (when my engine would start but the Allison would not shift out of neutral
), a bad relay in my VIM was the cause.
I pulled all 6 relays, bench tested them and found one that no longer functioned.
If would have pulled them one by one, tested and reinstalled the good ones, until I found the bad one and replaced it I would have been able to determine the purpose of the bad one....(however the transmission has worked perfectly for the 5 years since).
BTW, 6 years earlier, a corroded inline fuse holder near the chassis battery, (in the + wire form the battery to the VIM), cased a "no crank/no start" condition.
Cleaning the contacts in that fuse holder and replacing the fuse, (which was NOT blown), has allowed the engine to start normally for the last 11 years.
'96 Safari, MD3060 Allison, 134 kmiles