so my 89WD21 has been acting up lately, first of all my battery warning light and E-Brake light stay on all the time. Well this friday my E-Brake light went off, so i thought oh good one less problem to worry about.... WRONG. about a mile down the road the truck just died out of nowhere while i was driving, it cranked just fine when i went to start it agin but would only start if i used the interlock switch and would die out again as soon as i tried to get on the gas. so i left the truck sit for an hour and came back to it.... ran fine. this same thing happened to me 4 or 5 times since friday, if the E-Brake light stays out for over a minute or two then the truck will shut down and wont move again for another hour or so, sometimes it happens when the vehicle is warm sometimes it happens when its cold. if you have any information at all please let me know, im at at total loss. Thank you!