SPONSORED LINKS

Speedometer inoperable

Tiny
KEVIN1954
  • MEMBER
  • 1998 FORD E-SERIES VAN
  • 7.4L
  • V8
  • 2WD
  • AUTOMATIC
  • 52,000 MILES
Speedometer inoperable getting signal from differential speed sensor to ABS module. Supposed to be black/gray wire leading to PCM.I have no such color. Wondering if anyone may know what color wires I need?
Saturday, March 17th, 2018 AT 7:40 AM

26 Replies

Tiny
PATENTED_REPAIR_PRO
  • MECHANIC
  • 1,853 POSTS
There is no 7.4 engine. Is it a 7.3?
I see it actually as a gray/black wire.
If the odometer works, replace the instrument cluster.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Saturday, March 17th, 2018 AT 7:59 AM
Tiny
KEVIN1954
  • MEMBER
  • 15 POSTS
Yes my bad. It is Aiso a Thomas shuttle bus conversion.
Was this
answer
helpful?
Yes
No
Saturday, March 17th, 2018 AT 8:01 AM
Tiny
KEVIN1954
  • MEMBER
  • 15 POSTS
That is what throwing me off that is what my diagram shows also.
Was this
answer
helpful?
Yes
No
Saturday, March 17th, 2018 AT 8:08 AM
Tiny
KEVIN1954
  • MEMBER
  • 15 POSTS
Already sent the cluster in for repair came back fully tested good to go.
Was this
answer
helpful?
Yes
No
Saturday, March 17th, 2018 AT 8:12 AM
Tiny
PATENTED_REPAIR_PRO
  • MECHANIC
  • 1,853 POSTS
Are you getting a code P0500?
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Saturday, March 17th, 2018 AT 8:37 AM
Tiny
KEVIN1954
  • MEMBER
  • 15 POSTS
No codes at all.
Was this
answer
helpful?
Yes
No
Saturday, March 17th, 2018 AT 8:39 AM
Tiny
PATENTED_REPAIR_PRO
  • MECHANIC
  • 1,853 POSTS
Pin 58 of the PCM is where the gray/black wire should be.
Images (Click to make bigger)
Thumb
Thumb
Was this
answer
helpful?
Yes
No
Saturday, March 17th, 2018 AT 8:39 AM
Tiny
KEVIN1954
  • MEMBER
  • 15 POSTS
I think we are looking at the same diagram. There is no pin 58. This truck receives it speedometer from the differential sensor. The particular diagram is for the transmission sensor.
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Saturday, March 17th, 2018 AT 8:55 AM
Tiny
PATENTED_REPAIR_PRO
  • MECHANIC
  • 1,853 POSTS
It is there in that diagram, too. Lower right hand corner is pin 58 of the PCM, same gray/black wire.
Was this
answer
helpful?
Yes
No
Saturday, March 17th, 2018 AT 9:23 AM
Tiny
KEVIN1954
  • MEMBER
  • 15 POSTS
That is what I am saying there is no gray/black wire on the ABS module or the PCM. All I have is the lg/bk and rd/pk sensor wires leading into the ABS module.
Was this
answer
helpful?
Yes
No
Saturday, March 17th, 2018 AT 9:29 AM
Tiny
PATENTED_REPAIR_PRO
  • MECHANIC
  • 1,853 POSTS
Can you please give me the VIN number?
Was this
answer
helpful?
Yes
No
Saturday, March 17th, 2018 AT 9:31 AM
Tiny
KEVIN1954
  • MEMBER
  • 15 POSTS
1fdse37f5whb73962
05/98
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Saturday, March 17th, 2018 AT 9:36 AM
Tiny
PATENTED_REPAIR_PRO
  • MECHANIC
  • 1,853 POSTS
So what color wire is at pin 58 of the PCM?
Was this
answer
helpful?
Yes
No
Saturday, March 17th, 2018 AT 9:41 AM
Tiny
PATENTED_REPAIR_PRO
  • MECHANIC
  • 1,853 POSTS
Why are you looking under the rear axle speed sensor anyhow?
Those are the correct wires at that rear axle speed sensor, but it os the other sensor that I see is for the speedometer.
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Saturday, March 17th, 2018 AT 9:47 AM
Tiny
KEVIN1954
  • MEMBER
  • 15 POSTS
There is no number 58 only goes to 40. Only wires in that local are gray/red. Yellow/blue.
Was this
answer
helpful?
Yes
No
Saturday, March 17th, 2018 AT 9:52 AM
Tiny
PATENTED_REPAIR_PRO
  • MECHANIC
  • 1,853 POSTS
Only 40 pins? I see over 100. 104 actually.
Where exactly is this PCM located?
Near the brake master cylinder?
See the pins here.
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Saturday, March 17th, 2018 AT 9:59 AM
Tiny
KEVIN1954
  • MEMBER
  • 15 POSTS
Left fender by master cylinder. My understanding from other techs the speedometer picks up its signal from the differential not the transmission. By the way I have a good signal to my scanner from the transmission sensor.
Was this
answer
helpful?
Yes
No
Saturday, March 17th, 2018 AT 10:24 AM
Tiny
PATENTED_REPAIR_PRO
  • MECHANIC
  • 1,853 POSTS
That is not what I see from them wiring diagrams. Look at the gray/black wire to the instrument cluster, it comes from the transmission speed sensor.
Did you actually check that pin 58 of the PCM? Or did you just assume there was no pin 58?
Was this
answer
helpful?
Yes
No
Saturday, March 17th, 2018 AT 10:42 AM
Tiny
PATENTED_REPAIR_PRO
  • MECHANIC
  • 1,853 POSTS
I do not see the PCM on the fender. Here is a diagram under the hood.
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Saturday, March 17th, 2018 AT 10:46 AM
Tiny
KEVIN1954
  • MEMBER
  • 15 POSTS
Why check check 58 or gray/black if it does not exist.
Was this
answer
helpful?
Yes
No
Saturday, March 17th, 2018 AT 10:52 AM

Please login or register to post a reply.

Related Instrument Cluster Gauge Speedometer Content

VIEW MORE

Sponsored links