recently pulled my automatic out of my 91 dodge cummins and sawped it to a standard but b4 i didt i had no over dirve on the automatic and no spedometer or wait to start light. the over drive doesnt matter now obviously but i still have no spedometer or wait to start light

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[QUOTE=Get Rowdy;446870]recently pulled my automatic out of my 91 dodge cummins and sawped it to a standard but b4 i didt i had no over dirve on the automatic and no spedometer or wait to start light. the over drive doesnt matter now obviously but i still have no spedometer or wait to start light any suggestions

 

hmm.... Not sure on that one... Not much on teh OD trannys. Some one will help you though!

 

im not wooried about the overdrive anymore it doesnt have it now cause i made the truck a standard i just have no spedometer or wait to start light

 

if its a 4wd the vehicle speed sensor is going to come from your transfer case. if its a 2wd it comes from the transmission. the vss is only a 2 or 3 wire hookup. odds are either the vss is bad or you have a bad wire somewhere. one wire will be a signal wire too the computer because it was a auto before. the other wire will be the output back to the speedometer. if there is a 3 wire i believe it is a ground

the speedometer and wait to start light are 2 COMPLETELY different circuits (unless its a faulty ECU thats the only way both could go bad at the same time) so you have 2 problems. the wait to start light is a signal from the engine computer on an automatic (i dont remember if it sends 12v or a ground but either way it works one way or the other)

the way the wait to start light works all goes through the computer, when the computer determines your grid heaters are shuting off, it sends the power (or ground) to your wait to start light. so you have just a few problems it could be start here:

1)the obvious: check the bulb in the wait to start light
2) check the computer to make sure it is sending a signal from the computer - possibly a bad computer
3)check continuity with a DVM to make sure you have a good wire from the computer to the wait to start light
4)if all of these appear good, you have either a bad computer or something faulty with your warm up sequence.

hope it helps. if you need to get more involved in it let me know im pretty good with electrical

 

mine did this and the gauge lights were real dim and it was all ground ground ground check it

 

its a 91 i dont beleive it has a computer

 

i thought all of them have to computer to control the sensors and lights and what not. maybe they didnt in 91 but thats how my 93 worked

 

no computer at all the sensors are just on or off 89-91.5 i belive

 

the ground thats connected right onto the block is good where was ur bad ground located

 

i have the same problem but with the getrag how can you check the computer on it my truck is a intercooled 91.5