Convertible

Heating For Rear Window Diagrams:

Heating For Rear Window Components:

Locations of components

3 Earthing point
In the fascia

17 Extra rheostat for the lighting of switches and controls
On the left-hand side of the fascia

22A Fuse holder
In the electrical distribution box, in the engine compartment, on the left-hand wheel housing

47J Rear window heater warning lamp
In the combined instrument on the instrument panel

48 Cigarette lighter
On the fascia

59 2-pole connector
One in the electrical distribution box in the engine compartment, on the left-hand wheel housing
One on the inside of the top, on the left-hand side (Convertible)

60 Single-pole connector
In the luggage compartment, at the left-hand lid hinge, behind the trim

113 Relay/time delay relay for the electrically heated rear window
In the electrical distribution box in the engine compartment, relay position C

115 Electric heater for the rear window

116 Switch for the electrically heated rear window
In the centre of the fascia

152A 29-pole white connector
152B 29-pole red connector
In the electrical distribution box in the engine compartment, on the left-hand wheel housing. The connectors are accessible from the interior of the car.

159 Distribution terminal +15
In the electrical distribution box, in the engine compartment, on the left-hand wheel housing

169 Switch,AC
On the fascia

207 Electrically-heated rear-view mirrors
One on each front door

279 Mercury switch for the electrically heated rear window (Convertible)
On the top mounting on the left-hand side inside the top

Operation
The electric heating of the rear window can be switched on and off by means of switch 116. (The switch is spring-loaded and is combined with a time- delay relay.) For a complete description of the wiring for the lighting of the switch on cars for the US and CA markets and 1989 model for JP, see also the section entitled "Lighting systems, Lighting for controls - US, CA and 1989forJP".

The switch is supplied from fuse 13, via 29-pole red connector 152B (when the ignition switch is in the drive position).

When the switch is depressed, relay 113 will be energized. Warning lamp 47J in the combined instrument will be alight. Electric heater 115 for the rear window will then be supplied from fuse 29, via the relay contacts.

The relay coil is earthed (terminal 85 or 31 of time- delay relay) via mercury switch 279 which is open when the top is down and is closed when the top is up. The relay is thus always de-energized when the top is down.

Time-delay relay
On certain markets, relay 113 has been replaced by a time-delay relay and spring-loaded switch 116.

After the switch has been depressed and the relay has been energized, the time circuit in the relay will be supplied (terminal 15) from fuse 22. After around 10 minutes, the relay will switch off the supply to the electric heating for the rear window. If the switch is depressed when the heating is on, the relay will trip.

When the electric heating for the rear window is switched on, warning lamp 47J will be supplied from terminal E of the relay.

If the ignition is switched off while the electric heating for the rear window is switched on, the supply to terminal 15 will be opened, and the relay will immediately trip the supply to the heating element for the rear window.

US and CA markets
The time-delay relay also controls the heating of the rear-view mirrors.

Fault-tracing hints
The electric heating for the rear window will be operative when the ignition switch is in the drive position.

1. Check fuses 13 and 29 and check that the supply to them is live. (On cars for some markets, also check fuse 22.)
2. Check that the supply to the switch and terminal 30 of the relay is live.
3. Check the relay: Press the switch and check that the supply to the electric heating for the rear window is live.
4. Check that the mercury switch closes the circuit when the top is raised.
5. Check the connectors, cable harnesses and earth connections.