Electrical woes!!!

[budbombpipe]

Hi, trying to sort out afew electrical problems on my C reg, 19 watercooled caravelle,sorted some, but i am now stuck on the following:
1.In the fusebox, there is no relay for the fog lamp, what number is the missing relay?

2. Also there is no rear washer relay, again what number is it?

3.On the headlight switch on the dash, there are a black/yellow & a black/white wires coming /going to the switch. Switching on or off there is no power coming or leaving via these wires, is this correct? My headlights do not come on.

4.The water gauge red light constantly flashes yet the water tank is full, anyone no why?

5. There is no power going to the fog light switch and the rear heater switch on the dash, any clues?

6.I can't get the heater to come on. There is no live power to the connector on the dash (the 0.1.2.3. switch)

7.Ive found a round black connector that goes nowhere behind the dash, it looks the same as the connector that goes on the 0123 heater switch. Whats it for? It has 4 wires going to it, yellow, yellow/black, black/yellow & white.

8.Ive also found 2 other connectors behind the dash that go nowhere, both have 3 wires to them. 1 is blue/brown, green/white black the other is red, grey, blue.

Ive tried using my manual but got stuck on the above, any help/advice gratefully received!!!! Thanks.

[Aidan]

fog relay position 7 it's a 53
rear washwipe position 11 it's a 72
yellow and black are live when ignition off and indicator on - supply to parking side light
fog is fuse 6, rear heater maybe same or share an earth
constantly flashing warning light is bad earth or fault in circuit - it self checks on power up and should go off before about 30 secs - but I have found it linked to damp in the relay board in the past.
heater is fuse 13
other connections maybe radio speaker factory fit and the heater switch type plug may well be another one, suggesting the motor has been swapped, the loom is part of the heater motor, you'll just have to trace it back.
iirc green/white is rear heated window/heated mirror , posibly these are electric mirror looms

[budbombpipe]

Thanks for that, really helpful. I let you know how i get on.

[Syncro G]

Sounds to me like you've got a problem with the Load reduction Circuit, or X as its called on the wireing diagram. This is the black/yellow wire, it starts from the Ignition switch, and goes to the headlamp switch (to power the headlamps, but not sidelamps!) and then goes on to trigger the load reduction relay which is in position 8. This relay switches power for all other high current devices, namely heater fans, heated screens, some wiper functions... anything that draws high current and is switched with the ignition - it gets cut off when the starter motor is running (hence reduices load on the battery). As nothing works I'd start at the ignition switch, if you get the headlamps going it could be the X relay but the headlamps are the only thing on that circuit that doesn't use the relay so a relay fault shouldn't affect them.

Foglamps - If you van has front foglamps, all foglamps are powered through the relay, active when X and sidelamps are both on. Fuse 6 is for the front fogs and the rear fog is a seperate fuse above the relays where the posh optional extras stuff goes (don't know why the rear fog ended up with them but unlike the UK, germans didn't seem to need them as standard). If you don't have front foglamps the rear fog will be powered from the headlamps so can only work when they are on. Fuse 6 will be there but have nothing to do and the relay won't be fitted. On right hand drive vehicles with dimdip the relay won't be wired up eather so fitting one will do nothing without changing some wires behind the dash - pointless if you don't have front fogs (but important if you fit them!).

There will be quite afew unused terminals floating around behind the fusebox, this is normal as many vans seem to have wireing in place for kit they don't actully have - if everything works once the X thing has been sorted I wouldn't worry, if you find one thing still doesn't work then that could explain what one of these empty plugs does. - how many toys does your Caravelle have? SOme have more than others but many probubly have all the wires for the extra kit hideing somewhere unused.

[budbombpipe]

Thanks for the advice. I followed the black/yellow wire and found a connector that the previous owner fitted. I opened it up and the wires were not connected!!!!! i joined them up properly and things now work.
Thanks again for the tips.