What resistance should the 1995 Bronco TR sensor transmission circuit read in Park?

Measuring between terminals 359 (GY/R) and 199 (LB/Y), a good switch reads 3770-4607 ohms in Park. Other values: Reverse 1304-1593, Neutral 660-807, Drive 361-442, Second 190-232, First 78-95 ohms.

How do I test the backup lamp circuit on the TR sensor?

Connect an ohmmeter or self-powered test lamp between terminals 298 (P/O) and 140 (BK/PK). A good switch shows less than 5.0 ohms in Reverse and greater than 100K ohms in all other positions (Park, Neutral, Drive, Second, First).

In which gear positions should the starter relay circuit show continuity?

Testing between the two 32 (R/LB) terminals, a good switch reads less than 5.0 ohms in Park and Neutral, and greater than 100K ohms in Reverse, Drive, Second, and First.

How is the 4X4 low-neutral sense circuit tested?

Test between terminals 463 (R/W) and 57 (BK). A good switch shows a closed circuit only in Neutral and an open circuit in Park, Reverse, Drive, Second, and First.

What wire colors are on the TR sensor connector?

The document shows circuits 32 (R/LB), 463 (R/W), 140 (BK/PK), 359 (GY/R), 298 (P/O), 199 (LB/Y), and 57 (BK) on both E4OD and 4R70W connectors; the 4R70W version also shows 33 (W/PK).

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1995 Ford Bronco TR Sensor Testing - E4OD & 4R70W Pinout, Resistance Chart

1995 Ford Bronco transmission range (TR) sensor component testing ohm values E4OD 4R70W

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Transmission Range sensor test chart for E4OD/4R70W: ohmmeter resistance values per gear position to verify start, backup-lamp, and 4x4 low circuits.

Part of 1987-1991 Ford Bronco Service Procedures

AI caption December 2011 · Photo 987 of 1787

This page (149-9) from a 1995 Ford Bronco service reference covers component testing of the Transmission Range (TR) Sensor, also known as the neutral safety/manual lever position switch. It shows pinout diagrams for two connector variants: one used with the E4OD transmission and one with the 4R70W transmission, each with circuit numbers and wire colors (32 R/LB, 463 R/W, 140 BK/PK, 359 GY/R, 298 P/O, 199 LB/Y, 57 BK, and 33 W/PK on the 4R70W). A component testing procedure table lists expected resistance readings for each gear position using an ohmmeter or self-powered test lamp: the transmission circuit (359 and 199) ranges from 3770-4607 ohms in Park down to 78-95 ohms in First; the backup lamp circuit (298 and 140) reads less than 5.0 ohms only in Reverse; the starter relay circuit (32 and 32) reads less than 5.0 ohms in Park and Neutral; and the 4X4 low-neutral sense circuit (463 and 57) is closed only in Neutral. A schematic at the bottom shows the internal switch contacts for P/R/N/D/2/1 positions and how each circuit routes through the sensor. This lets a technician bench-test or in-vehicle test the TR sensor for correct operation.

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Frequently asked questions

What resistance should the 1995 Bronco TR sensor transmission circuit read in Park?: Measuring between terminals 359 (GY/R) and 199 (LB/Y), a good switch reads 3770-4607 ohms in Park. Other values: Reverse 1304-1593, Neutral 660-807, Drive 361-442, Second 190-232, First 78-95 ohms.
How do I test the backup lamp circuit on the TR sensor?: Connect an ohmmeter or self-powered test lamp between terminals 298 (P/O) and 140 (BK/PK). A good switch shows less than 5.0 ohms in Reverse and greater than 100K ohms in all other positions (Park, Neutral, Drive, Second, First).
In which gear positions should the starter relay circuit show continuity?: Testing between the two 32 (R/LB) terminals, a good switch reads less than 5.0 ohms in Park and Neutral, and greater than 100K ohms in Reverse, Drive, Second, and First.
How is the 4X4 low-neutral sense circuit tested?: Test between terminals 463 (R/W) and 57 (BK). A good switch shows a closed circuit only in Neutral and an open circuit in Park, Reverse, Drive, Second, and First.
What wire colors are on the TR sensor connector?: The document shows circuits 32 (R/LB), 463 (R/W), 140 (BK/PK), 359 (GY/R), 298 (P/O), 199 (LB/Y), and 57 (BK) on both E4OD and 4R70W connectors; the 4R70W version also shows 33 (W/PK).