e40d no shift, and no tach?????

[Hardass559]

being that body styel its probly under the dash since thers no fuse box under the hood i havent really looked at one that year with a auto i have a wireing harness for one tho

 

[purg113]

under hood, drivers side, black box.

 

[Hardass559]

i don't have a 1990 diesel with a auto but my 5 speed don't have a fuse box under the hood. and i have a wiring harness for a auto and there's no fuse box on that either. so lets re think this if any thing there's another relay or a burnt out fuesabull link some where . i may be wrong the harness i have was pulled from a junk yard that don't let you pull your own parts they may have un hooked said fuse box but even the gas trucks that year don't have one that i know about . the obd 1 plug tho shuld read tranny codes maybe i don't even know why they have one if not for the trans . again i don't have one so i really don't know ik the 92 and up body does have one i stay away from autos bc they normaly don't last a week if i get one only had one survive the 6monthes i had nothing else to use and i don't know how that c6 did it you could cook hot dogs on the floor when i had my goose neck hooked to it yes ik it could have used a cooler it was run thru the radiator cooler only dident have any thing else hope this helps i would like to know why my 93 does the same thing

 

[OLDBULL8]

Might help. Keep running like that and you'll ruin the tranny.