Differences between Lucas starter relays - Austin Marina

[LarryK]

Hello all,

In an effort to resolve starting/electrical issues with my Austin Marina, I ordered two different Lucas 6RA starter relays online:

one SRB111 (https://www.ebay.ca/itm/223965225655)

and one SRB113 (https://www.ebay.com/itm/lucas-SRB113-3 ... 1991565025).

I think the latter is the correct one, but I'm just going by what is currently installed in my car.

The SRB111 has just arrived and the main difference is that it has 5 connectors (including a double C1) whereas the SRB113 has 4.

Can I install the SRB111 with the C1 lead going to either of the C1 connectors (if so, does it matter which one?), or is this going to be non-functioning/A Bad Idea and should I just wait for the SRB113 to arrive?

I'm aware that relays like these weren't fitted to UK-market Marinas, but perhaps someone has experience with them from other BL cars.

Thanks,

Larry

[david painter]

Both are 4 pin normally open relays. With the SRB111 having two spade outputs joined together. both would be fully interchangable.

Yo may be more familiar with the DIN way of numbering relay pins.

Term 30=C2 12 volt power supply
Term 87=C1 12 volt out put to consumer
Term 86=W1 12 volt switch supply
Term 85=W2 12 Volt earth

Think of C1 and C2 standing for consumer the high load circuit, W1 and W2 standing for winding the low current input from switch.
I dont know what the exact Lucas designations stand for. The above is how it works. I would think the joined together C1 terminals would be used for something like switching a pair of headlamps but would work perfectly well in your starter relay application. See wiring diagrams below.
Dave

lucas srb111.jpg (11.39 KiB) Viewed 1556 times

lucas srb111.jpg (11.39 KiB) Viewed 1556 times

[LarryK]

Thanks. It seemed to work better than the existing SRB113, but not to the extent of engaging the starter... Do you have the diagram for the SRB113 as well?

[david painter]

lucas srb 113.jpg (8.46 KiB) Viewed 1544 times

Sorry meant to put one of each
Dave