What wire carries the tachometer signal in this diagram?

Circuit 731 Y/BL (yellow/blue) carries the tachometer signal, routed inside a Tachometer Signal Shield. On the 2.0L it comes from the ignition coil (C171) and Ignition Control Module (C147); on the 2.5L it comes from the distributor via C170.

What connectors are in the oil pressure gauge circuit?

The oil pressure gauge circuit runs on wire 110 P/Y from cluster connector C240 through C255 and C126 to C1000 at the oil pressure sender.

How does the oil pressure sender work according to this diagram?

Per the callout, resistance in the sender increases as oil pressure drops, resulting in low voltage and current at the instrument cluster and producing little meter movement.

Where does the tachometer ground?

Through connector C241 on wire 59 BK/R, via splice S228 to ground G105 (see grounds pages 10-4, 10-11).

What does the 20 W/BK wire connect to?

The 20 W/BK circuit runs from the instrument cluster through C206 and splice S2014, splitting for WITH ABS (to C223, ABS Control Module, page 42-2) and continuing through C180 and C153 to the Internal Alternator Regulator (IAR), page 12-1.

Home/ Registry/ Ford/ Probe/ 1993-1997/ “parts”/ Photo supermotors.net/registry/media/930537

Ford Probe Instrument Cluster Wiring Diagram - Tachometer & Oil Pressure Gauge

Ford wiring diagram for ignition coil, tachometer, alternator regulator and oil pressure gauge

‹ ›

Ford wiring diagram showing the ignition coil, tachometer, internal alternator regulator, oil pressure gauge and sender with color-coded wires.

AI caption July 2012 · Photo 422 of 676

This document is a scanned wiring diagram page covering the instrument cluster tachometer and oil pressure gauge circuits for a Ford Probe, with separate ignition input paths shown for the 2.0L engine (ignition coil C171 and Ignition Control Module ICM at C147, page 21-3) and the 2.5L engine (distributor, page 21-5). The tachometer signal travels on circuit 731 Y/BL inside a shielded cable (Tachometer Signal Shield) with shield drains 60/61 BK to ground G106. The oil pressure gauge feeds through connectors C240, C255, and C126 on circuit 110 P/Y down to the oil pressure sender at C1000; a note explains sender resistance increases as oil pressure drops, producing little meter movement. The charge indicator/alternator circuit (20 W/BK) runs through C206, splice S2014, C180, and C153 to the Internal Alternator Regulator (IAR, page 12-1), with a WITH ABS/WITHOUT ABS split routing to the ABS Control Module at C223 (page 42-2). The tachometer grounds through C241 on 59 BK/R via splice S228 to G105. Cross-references include grounds pages 10-4, 10-8, 10-9, and 10-11. Readers can trace wire colors, circuit numbers, connectors, splices, and grounds for cluster diagnosis.

Is this accurate? Sign in to help verify it.

Frequently asked questions

What wire carries the tachometer signal in this diagram?: Circuit 731 Y/BL (yellow/blue) carries the tachometer signal, routed inside a Tachometer Signal Shield. On the 2.0L it comes from the ignition coil (C171) and Ignition Control Module (C147); on the 2.5L it comes from the distributor via C170.
What connectors are in the oil pressure gauge circuit?: The oil pressure gauge circuit runs on wire 110 P/Y from cluster connector C240 through C255 and C126 to C1000 at the oil pressure sender.
How does the oil pressure sender work according to this diagram?: Per the callout, resistance in the sender increases as oil pressure drops, resulting in low voltage and current at the instrument cluster and producing little meter movement.
Where does the tachometer ground?: Through connector C241 on wire 59 BK/R, via splice S228 to ground G105 (see grounds pages 10-4, 10-11).
What does the 20 W/BK wire connect to?: The 20 W/BK circuit runs from the instrument cluster through C206 and splice S2014, splitting for WITH ABS (to C223, ABS Control Module, page 42-2) and continuing through C180 and C153 to the Internal Alternator Regulator (IAR), page 12-1.