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Speedometer signal voltages

Tiny
KEVIN1954
  • MEMBER
  • 1998 FORD E-SERIES VAN
  • 7.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 53,000 MILES
Speedometer inoperable, good speed sensors and wiring. Wondering what color are the signal wires to the the speedometer head and what the voltage readings should be?
Wednesday, March 7th, 2018 AT 4:29 AM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning.

Do you have a scan tool to monitor the input to the PCM from the sped sensor? You need that to see if it is generating a signal to the PCM. If it does, then it is transferred to the cluster to display a mileage and speed. You cannot see a voltage as it is a pulsed reading that goes to the cluster.

Roy
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Wednesday, March 7th, 2018 AT 7:16 AM
Tiny
KEVIN1954
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Thanks Roy.
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Wednesday, March 7th, 2018 AT 8:40 AM
Tiny
ASEMASTER6371
  • MECHANIC
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You are welcome.

Roy
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Wednesday, March 7th, 2018 AT 9:15 AM

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