Riviera V6-3.8L SC VIN 1 (1995)
Install jumper harness, P/N 12165487, in the left-hand (primary) coolant fan harness. This jumper harness contains an integral surge suppression diode.
Refer to Attachment 1 for the electrical diagram of the fan with installed jumper harness.
Inspection - Buick Riviera
Before installing a jumper harness, perform the following inspection/test procedure.
1.
Locate left-hand (primary) coolant fan connector. (For Riviera, it is on the fan).
2.
Examine the left-hand coolant fan harness to determine if a jumper harness has already been installed. Do not install a new jumper harness if one is
already present.
3.
On some vehicles, a surge protection diode may have been previously installed during service. In this case, there is a diode splice in the main body
harness near the left-hand coolant fan. Perform Step 4 below to check for the presence of this diode. If Step 4 verifies the presence of a diode, NO
JUMPER HARNESS is needed. Do not install a jumper harness.
4.
Test for the presence of a diode in the body harness as follows:
