Speeodmeter and odometer

Tiny
JESTERGMC
  • MEMBER
  • 1992 GMC SONOMA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 125,000 MILES
My speedometer and odometer quit working. I replaced the speed sensor on trans. Checked resistance on the stepper motors in cluster. Replaced cluster. Check for voltage going to speed sensor plug=0. Also traced wiring back to firewall. What else can I do?
Saturday, May 7th, 2011 AT 4:30 PM

13 Replies

Tiny
JESTERGMC
  • MEMBER
  • 8 POSTS
I also cleaned plug with electrical cleaner and checked for voltage at the wire and plug.
Was this
answer
helpful?
Yes
No
-1
Saturday, May 7th, 2011 AT 4:34 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Raise rear wheels off ground place DVOM meter on AC scale trans in neutral. Rotate tires by hand @3mph meter shloud read.5 - 1 v AC
Was this
answer
helpful?
Yes
No
Saturday, May 7th, 2011 AT 4:41 PM
Tiny
JESTERGMC
  • MEMBER
  • 8 POSTS
Do I take the reading off the speed sensor? If it read good or bad what are the options?
Was this
answer
helpful?
Yes
No
Saturday, May 7th, 2011 AT 5:49 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Yes reading off seed sensor this will tell if signal is being produced
Was this
answer
helpful?
Yes
No
Saturday, May 7th, 2011 AT 7:13 PM
Tiny
JESTERGMC
  • MEMBER
  • 8 POSTS
I got readings that jumped from 0 to 1.5 but had to turn the wheels at higher speed to get anything? So what does that mean?
Was this
answer
helpful?
Yes
No
Tuesday, May 10th, 2011 AT 8:20 PM
Tiny
JESTERGMC
  • MEMBER
  • 8 POSTS
Is there something simple that I am missing?
Was this
answer
helpful?
Yes
No
Tuesday, May 10th, 2011 AT 8:54 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Find VSS buffer item F in first diagram on firewall near ECM. Check White Wire term.10 for output to speedo also check input signal from VSS
Images (Click to make bigger)
Thumb
Thumb
Was this
answer
helpful?
Yes
No
Wednesday, May 11th, 2011 AT 1:52 PM
Tiny
JESTERGMC
  • MEMBER
  • 8 POSTS
I am having a hard time finding the VSS. Is it on the engine firewall or in the cab?
Was this
answer
helpful?
Yes
No
Saturday, May 14th, 2011 AT 4:43 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Info I have firewall next to ECM
Was this
answer
helpful?
Yes
No
Monday, May 16th, 2011 AT 8:12 PM
Tiny
JESTERGMC
  • MEMBER
  • 8 POSTS
Thanks. I found it and fixed it.
Was this
answer
helpful?
Yes
No
Thursday, May 19th, 2011 AT 2:03 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Great so it was VSS?
Was this
answer
helpful?
Yes
No
Thursday, May 19th, 2011 AT 3:32 PM
Tiny
JESTERGMC
  • MEMBER
  • 8 POSTS
It was a wire grounding out on the fire causing the brake fuse to blow. But I had brake lights the whole time.
Was this
answer
helpful?
Yes
No
Saturday, May 21st, 2011 AT 1:52 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Thanks that was an unusual fault good work finding that
Was this
answer
helpful?
Yes
No
Monday, May 23rd, 2011 AT 1:42 PM

Please login or register to post a reply.

Related Instrument Cluster Gauge Odometer Not Working Content

VIEW MORE