What ground points are shown in the 1997 Probe 2.5L grounds diagram?

Ground points G104 (locator 151-5 F9), G105, and G106 (locator 151-4 E10), with many circuits joining at the C106 joint connector before reaching ground.

Which PCM pins are grounded on the 1997 Probe 2.5L?

The diagram shows PCM ground pins 22, 17, 27, 33, 34, 32, and 31, using circuits such as 65 BK/R, 62 BK/BL, 63 BK, and 64 BK.

What wire colors are used for the ground circuits?

Circuits shown include 59 BK/R, 61 BK/R, 62 BK/BL, 63 BK, 64 BK, 65 BK/R, and 60 BK (black and black/red, black/blue wires).

How are the rear heated oxygen sensors grounded?

Left rear HO2S #21 grounds through connectors C127M/C127F and right rear HO2S #11 through C130M/C130F, each on 60 BK circuits leading through splices S110/S126 to ground G105.

Is the park/neutral position (PNP) switch ground the same for automatic and manual?

No — the C198F/C198M connection to the PNP switch is labeled 'MANUAL ONLY,' and the legend marks * MANUAL and ** AUTOMATIC variants (e.g., C151F/M vs C121F/M).

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1997 Ford Probe 2.5L Grounds Wiring Diagram - G104 G105 G106, PCM & HO2S

1997 Probe grounds wiring diagram with PCM, sensors, connectors and ground splices

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Service-manual wiring diagram of the 1997 Probe ground circuits showing the PCM, sensors, connectors and ground points.

AI caption April 2010 · Photo 66 of 66

This is page 10-9, "GROUNDS," from the 1997 Ford Probe electrical wiring diagram manual, covering the 2.5L engine ground distribution circuit. The diagram traces ground wiring from major components — fuel pump module (page 60-1), instrument cluster (page 60-2), powertrain control module/PCM (page 25-7, pins 22, 17, 27, 33, 34, 32, 31), 4EAT transaxle (page 25-4), distributor (page 21-3), left and right rear heated oxygen sensors HO2S #21 and #11 (page 25-5), and the park/neutral position (PNP) switch (page 23-5, manual transmission only) — down to ground points G104, G105, and G106 via the C106 joint connector. Wire circuits shown include 59 BK/R, 61 BK/R, 62 BK/BL, 63 BK, 64 BK, 65 BK/R, and 60 BK, with numerous connectors (C419, C404F/M, C200F/M, C241, C247, C248, C249M/F, C1012, C127M/F, C130M/F, C198F/M, C149M/F, C134, C135, C151F/M, C121F/M) and splices (S228, S123, S126, S110, S104). Automatic (**) versus manual (*) transmission variations are noted. Cross-references point to the engine shield ground (page 10-10) and splice S211 (page 10-11). Locator codes such as 151-11 F7, 151-9 A1, 151-7 B10, 151-4 E10, and 151-5 F9 identify connector/ground positions.

This document covers 1997, which may differ from this 1996 Ford Probe.

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Frequently asked questions

What ground points are shown in the 1997 Probe 2.5L grounds diagram?: Ground points G104 (locator 151-5 F9), G105, and G106 (locator 151-4 E10), with many circuits joining at the C106 joint connector before reaching ground.
Which PCM pins are grounded on the 1997 Probe 2.5L?: The diagram shows PCM ground pins 22, 17, 27, 33, 34, 32, and 31, using circuits such as 65 BK/R, 62 BK/BL, 63 BK, and 64 BK.
What wire colors are used for the ground circuits?: Circuits shown include 59 BK/R, 61 BK/R, 62 BK/BL, 63 BK, 64 BK, 65 BK/R, and 60 BK (black and black/red, black/blue wires).
How are the rear heated oxygen sensors grounded?: Left rear HO2S #21 grounds through connectors C127M/C127F and right rear HO2S #11 through C130M/C130F, each on 60 BK circuits leading through splices S110/S126 to ground G105.
Is the park/neutral position (PNP) switch ground the same for automatic and manual?: No — the C198F/C198M connection to the PNP switch is labeled 'MANUAL ONLY,' and the legend marks * MANUAL and ** AUTOMATIC variants (e.g., C151F/M vs C121F/M).