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!

RSWORDS's Sig:

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

tltruckparts's Sig:

1995 Chevy K2500, 1993 Cummins P Pumped 12 valve Turbo Diesel IC, Getrag 5 speed w/ southbend clutch, NP205 Transfercase, SAS w/ GM Dana 60 front, AAM 11.5 rear, BFG MT 35's. SDX 5x14 injectors, PhatShaft 62, airdog II 165, Autometer EGT, Boost, & Fuel Pressure, hydraulic steering. and a few moore goodies

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

big bad diesel 416's Sig:

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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

91cumminsboy's Sig:

91 dodge cummins turbo diesel 4inch exhuast to 5 inch stack with some other mods still in progress....

you need to find a wiring diagram for it and trace the wires and test the components.

mine had a ground wire from the - side right to the frame like 6 in of wire when i first bought the truck it had not been started in over a year i opened the hood and saw that and said look at this hillbilly shit and riped it off the owner had lost the keys so i hot wired the pump and the starter then drove it home where i started it this way for about a month then put in an aftermarket ignition switch and then found out that the headlights were dim the gauge light were dim and it wouldn't start or run anyhoot i chased my tail on this for 4-5 days and finally figured it out i cant explain why but it works and has for the last 2 years i owned it