Cooling Fan - Continuous Running/Dead Battery
CATEGORYElectrical
SECTION
3
PAGE
38
ISSUE
02/93-0305
CODE
371
Supersedes 06/92-0218
Subject:
Radiator Fan Time-Delay Relay
Application:
1989- 900 and 9000 Models
On certain 900 and 9000 cars, the fan may not shut-off after the 10 minute cool down period and in some cases, causes the battery to go dead. Therefore, production of the time-delay relay, P/N 95 63 339, for the radiator fan has been discontinued. It is superseded by the standard relay, P/N 85 22 310. On 1990- models, these relays are fully interchangeable and the standard relay, P/N 85 22 310, should be installed as a replacement part, when needed.
NOTE
Some 1989 9000 model cars do not have the jumper connection which supplies the relay coil with operating current on terminal 86. It is easy to check whether or not a car has this jumper connection by following the procedure described below. If a standard relay is fitted to a car without this jumper, the fan will not function and the engine will overheat.
Cars Affected:
900 Models, VIN M2500000-
VIN M5010548-
VIN M7019457-
9000 Models, VIN M1020229-
Parts:
Standard Relay 85 22 310
The following parts are for 9000 Only
Cable, yellow, 0.5 sq.mm, 5O - 60 mm long
Cable, lug, 2.5 - 4.0 sq.mm 91 20 791
Cable, lug, 0.5 - 1.0 sq.mm 91 20 775
Disassembly tool, 85 80 094 (or similar)
Crimping pliers 30 14 222 (or similar)
Action:
900 Models
For location of the time-delay relay, refer to Figure 1.
Replace old time-delay relay with new standard relay, as needed. No modifications are required.
9000 Models
Check for Jumper (9000 only), Figure 2.
Check whether a cable lug is fitted at relay position E for the radiator fan (low speed), terminal 86. If so, fit a new standard relay.
If no cable lug is fitted, a jumper connection must be arranged between terminals 30 and 86 as described below for 9000 models.
Installation Procedures - 9000.
1. Disconnect the positive battery cable from the battery terminal to prevent shorting.
2. Remove the front relay and fuse board from the protective box.
3. Withdraw the wiring harness by a sufficient amount to allow access to the underside of the relay board, Figure 3.
4. Disconnect the yellow 4.0 sq.mm cable at relay position E, terminal 30.
5. Cut the cable as close as possible to the cable lug and strip off 4 - 5 mm of the insulation.
6. Crimp the thick yellow 4.0 sq.mm cable and a new section of thin yellow 0.5 sq.mm cable together in the same cable lug, P/N 91 20 791, Figure 4.
7. Crimp the other end of the thin yellow 0.5 sq.mm cable in the cable lug having part no. 91 20 775, Figure 4.
8. Fit the cable lug with the two cables to terminal 30 and the cable lug with the thin cable to terminal 86 on relay board position E, Figure 5.
9. Make sure that the cable lugs snap securely into position on the relay board.
10. Refit the fuse and relay board in the protective box and install relay, part no. 85 22 310, at position E, Figure 6.
11. Check that the cooling system fan work, properly.
Warranty Information:
For warranty repairs, use Failure Coding 36530-62-0-01-01. Time Allowance is labor operation no. 36501.