Radiator Cooling Fan Motor Relay: Testing and Inspection
*** UPDATED BY TSB# 074289 DATED OCTOBER 1989Radiator Fan Relay Schematic:
A faulty radiator fan relay system will set code 46 in the on-board diagnostic system. Refer to the schematic diagram and test the relay system with the diagnostic chart.
Wire color code identification:
L: Blue
B: Black
Y: Yellow
G: Green
R: Red
W: White
Br: Brown
Lg: Light green
Gr: Gray
Radiator Fan Relay Diagnostic Chart (a):
Radiator Fan Relay Diagnostic Chart (b):
RADIATOR FAN RELAY SYSTEM DIAGNOSTIC CHART
TSB INFORMATION
If you encounter a customer complaint of the engine cooling fan relay clicking consecutively at intervals of every two or three seconds after the engine is at operating temperature, it is possible to add a ground wire kit to increase the cycle time (P/N S0A635012). The cooling fan relay is located at the left side dash area.
To correct this condition, follow the procedure below.
1) Disconnect the negative terminal from the battery.
2) Remove the air cleaner.
3) Disconnect the two connectors from the engine to body harness. F-45 (2 pole gray) and F-46 (16 pole black). See 1989 Justy Service Manual, SECTION 6-3, PAGE 61.
4) Remove the lance support (yellow plastic guide) from the engine harness connector F-46 as shown in Figure 1.
FIGURE 2:
5) Remove the tape from section (A) to the tip of the corrugated tube as shown in Figure 2.
FIGURE 3:
6) Remove the (2) black/red wires, terminals 10 and 14 of connector F-46 engine side of connector (See Figure 3).
7) Discard the removed terminals by cutting the (2) black/red wires 10 mm back from the terminals. The cut ends must be wrapped with electrical tape.
8) Insert the 2 terminals of the new wiring harness into terminal locations 10 and 14 of connector F-46 which were removed in step 6. After inserting the terminals, confirm that they are completely locked in place.
9) Insert the new lance support into connector F-46.
FIGURE 4:
10) Wrap electrical tape around the corrugated tube which was previously removed in step 5.
11) Secure the additional wiring harness together with the engine wiring harness by using the three tie-wraps supplied in the kit. See Figure 4.
FIGURE 5:
12) Bolt the round terminal end of the additional wiring harness onto the intake manifold together with existing ground wiring harness. (Ground location GE) See Figure 5.
13) Reconnect connectors F-45 and F146.
14) Reinstall the air cleaner.
15) Reconnect the negative battery terminal.
^ The ground control circuit has been modified in production since 1/9/89 with engine no. 971617 starting with vin 714468.
Parts Information
Ground Harness Kit - P/N S0A635012