i swap a ls motor in. and the speedo would not work. the rest of the cluster does. i changed the vss sensor. i checked the connector to see if it was broken. looks fine. i havent checked the voltage because im on TDY in the Marine Corps. but im changing stations when i get back and was looking to fix it before i drove across country. any ideas? could it be the cluster? thanks

 

ideas?

 

Did you just swap motors or did u do a complete swap?? im assuming the speedo was working before you swapped this. Did you take the whole vss out or just the top half??

 

i swapped complete motors. motor tranny and vss from the ls swap. like i said i have already tried a working vss from my previous gsr swap. and i did take out the whole vss, with the gear and all. yes the speedo was working fine before. maybe a little jump around 5-20 mph but thats about it

 

bump

 

Check the fuse for the speed sensor. That's where I would start.

 

ive got the same problem in my 92 d15

 

if it was that fuse the rpm/gas/temp wouldnt work would it?

i still am having this problem. either tonight or tommorow im going to jack up the car and have the wheels rolling to test the OHM's of the vss.

any other ideas?

 

I had an issue with mine. I looked into it and there are 3 wires, one is 5 volts in, one is ground and one is a 5 volt signal wire that turns on and off. Check for a ground and 5 volts first with the ignition on, then the 5 volt signal wire runs from the VSS sensor, through the harness, through the driver's side shock tower plug and goes to the ECU and gauge cluster.

Mine was corroded. I cut the plug and ends off since the ends and the plug were all messed up, soldered on another and it's been working great since.

 

you said it all, I agree, check the ECU wires that feed to the speedo

 

Is CEL code 17 thrown? If not, focus on the speedo/cluster and check for a broken wire between the VSS and cluster.

 

ok ill check the plug. it could be the wiring. are you saying test it with the wheels moving or on the ground stationary?
it does throw code 17. could it be doing that because of the wiring? ive replaced it with another used vss. could they both be broken?

ive tried my usdm cluster and my jdm cluster.

would the black/yellow wire running into the dizzy affect it? ive read that before but in those cases it was a jumpy speedo needle.

 

Check the VSS connector for power and ground and the VSS signal wire for an open or short.

 

so i checked the vss with the car on jackstands. i get like 5v. i was looking at the plug going into the wire harness. it looked really corroded.

im going to tape into the vss plug about an inch up and run three individual connectors to the vss to see if i can get a reading.

i tried cheking behind the dash. was testing the yellow/blue wire. i didnt seem to get any power, but all the other wires i did. i had the car on at II

 

also if the speedo was bad would it still throw code 17?

 

SMH it works. it was the harness plug!!!!!

thank you all! im so happy now haha