Relay identification

[Ralph S3]

Hi All,

I'm in the process or ripping a faulty immobiliser out of the S3. The offending article is a Cobra 0802T and it has been inserted into the wiring alongside a couple of relays. Both the relays are in holders that are hanging separately from the wiring loom. They are not situated in the fuse box. The first one is a yellow relay in a yellow holder and the second is a red relay in a red holder. They are both marked as Ford 77180 40 amp relays.

Tracing the wiring and comparing it with the S3 wiring diagram I have identified the yellow relay as the Fuel Pump Relay.

Does anyone know what the red one is? I think it must be the fuel injection relay but this should have an associated diode that I can't see.

When the immobilser is activated I can still turn over the engine on the starter but the fuel pump doesn't run. So I know one of the immobiliser circuits is interfering with the yellow fuel pump relay. The second immobiliser circuit is interfering with this red relay?

Thanks..Ralph

[phillpot]

Ralph S3 said:

Does anyone know what the red one is? I think it must be the fuel injection relay but this should have an associated diode that I can't see.

Fuel injection relay should be a smaller brown relay, photo's here ... clicky

[Penelope Stopit]

Read through this https://www.pistonheads.com/gassing/topic.asp?h=0&...

[Ralph S3]

Thanks All.

All sorted now. Had to trace all the wires and draw it all in a big diagram. Then compared everything to the wiring diagram in Steve Heaths book to work it all out. Car starts now and the immobiliser is in the bin..!!

I guess I'll need to tell the insurance company that it no longer has an immobiliser.

Ralph

[phillpot]

Ralph S3 said:

I guess I'll need to tell the insurance company that it no longer has an immobiliser.

Or fit a new one .....