Camaro V8-350 5.7L (1989)
ECM related.
2.
If coolant fan does not run, connect fused jumper between coolant fan relay connector dark green/white wire terminal and ground and turn ignition
switch to RUN position. If coolant fan runs, check dark green/white wire for open. If wire is satisfactory, problem is ECM related.
3.
If coolant fan does not run, disconnect coolant fan relay connector, turn ignition switch to RUN position and connect test lamp between orange
wire terminal and ground. If lamp does not illuminate, check fusible link H and orange wire for open.
4.
If lamp illuminates in steps a and b, disconnect coolant fan relay connector and connect fused jumper between orange and black/red wire
terminals. If coolant fan runs, replace coolant fan relay.
5.
If coolant fan does not run, leave fused jumper connected as in step 4, disconnect coolant fan connector and connect test lamp between terminals
as follows:
a. Connect between black/red wire terminal and ground. If lamp does not illuminate, check black/red wire for open.
b. Connect between black/red and black wire terminals. If lamp does not illuminate, check black wire for open.
c. If lamp illuminates in steps a and b, replace coolant fan.
Test B: Coolant Fan Short Test
1.
With ignition switch in RUN position, remove C/H-FAN fuse.
2.
If coolant fan turns off, check dark green/white wire for short to ground. If wire is satisfactory, problem is ECM related.
3.
If coolant fan does not turn off, replace coolant fan relay.
