INSTRUMENTATION SERVICE MANUAL NUMBER 23
Page 4D-18 90-861326--1 MARCH 1999
Oil Pressure Switch
TESTING
1. Remove wire from sender terminal.
2. Connect continuity meter between sender terminal and sender hex. (Sender shown
removed for clarity.)
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3. With engine not running, meter should indicate full continuity.
4. Start engine. With engine running and engine oil pressure above 6 psi (41 kPa), meter
should indicate no continuity.
Transmission Fluid Temperature Switch
Switch is located on transmission. Switch is normally open. This switch is used on MIE
engines, if equipped.
87-88031 Switch
Opens 180-200° F (82-93° C)
Closes 220-240° F (104-116° C)
REMOVAL
1. Disconnect harness wires at switch.
2. Remove switch and sealing washer.
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a
b
Typical Location
a-Transmission Fluid Temperature Switch With Sealing Washer
b-Harness Wires
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