Power Distribution - New Electrical Center/Temp Switch
REF..NO. 54/14,83/21DATE: November 1986
TO: OUR MERCEDES-BENZ PASSENGER CAR DEALERS
SUBJECT:
MODIFIED ELECTRICAL CENTER MODEL 201.024 MODEL YEAR 1984
FIGURE 1 - MODIFIED ELECTRICAL CENTER:
FIGURE 2 - MODIFIED TEMPERATURE SWITCH:
Beginning with model year 1985, a modified electrical center (Figure 1) was phased in since the polarity of the switch for the electro-magnetic engine fan coupling was reversed from negative to positive. At the same time the 100°C temperature switch (S25/1, Figure 2) has been changed from a 1-pole to a 2- pole version.
Note:
Only the modified electrical center is available as replacement. When installing the modified electrical center in subject vehicles, only the 2-pole 100°C temperature switch together with a supplemental wiring harness must be used.
Subsequent Installation of Supplemental Wiring Harness and 100°C Temperature Switch Model 201.024, Model Year 1984
1. Remove air filter housing.
FIGURE 3 - TEMPERATURE SWITCH:
2. Remove temperature switch (S25/1 Figure 3) and replace with 2-pole unit.
FIGURE 4 - SUPPLEMENTAL WIRING:
3. Remove 2-pole plug (left arrow) from connector (b) and reconnect it to temperature switch (S25/1).
4. Connect 2-pole plug of supplemental wiring harness to connector (b).
5. Connect 1-pole connector supplemental wiring harness to 1- pole plug of the previous ture switch.
6. Connect ground cable of supplemental wiring harness to ground (W11).
7. Attach supplemental wiring harness, using a tie strap (right arrow) to main harness.
8. Check operation of electromagnetic clutch of engine fan by turning on ignition and bridging the 2-pole plug of the temperature switch (S25/1). The electromagnetic clutch should engage.
9. Install air filter housing.
Parts Information
Part Name Part Number
Temperature switch (2-pole) 006 545 15 24
Supplemental wiring harness 201 540 43 10
Tie strap 002 997 09 90
Electrical center 201 540 04 50
S.I. MBNA 54/14,83/21
Time Allowance
02-5412/41 Supplemental wiring harness and 100~C temperature 0.5 hrs.
switch, subsequent installation (with electrical center replacement)