Relay that hangs behind the middle of dash

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The_Dr
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Relay that hangs behind the middle of dash

Can anyone tell me what this is ?

It dangles down the middle of the dashboard, behind the temp gauge.

Is it the indicators or wipers relay ?

Car is a new SS1600 (275)

Jonathan Kay
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Until proved otherwise that's the headlamp relay. Recent discussion.

Please could you test to check.

Thanks

Jonathan

The_Dr
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Thanks,

What's the easiest way to test ? Operate the lights and listen for a clicking sound ?

SM25T
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Hold it and turn on the lights, you'll feel the operation. Or use a voltmeter on the terminals !

Jonathan Kay
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As above. Or remove the relay from its base and see what stops working.

Jonathan

PS: I'd be very interested in some photos of the layout of the other relays and the fuses.

The_Dr
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The other fuses were identified in this thread, but I haven't identified the relays as yet.

I will try and locate the indicator relay as I want to upgrade to LEDs.

SM25T
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That's an easier one as it clanks merrily with indicator on if an old electro mechanical type

Jonathan Kay
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"The other fuses were identified in this thread, but I haven't identified the relays as yet.

I will try and locate the indicator relay as I want to upgrade to LEDs."

Got it, thanks. That thread includes a possible relay layout.

I have some circuit diagrams that didn't appear in Assembly Guides that might become relevant.

When investigating this relay please could you try and discover if it is the headlamp ON/OFF, the headlamp MAIN/ DIP, or something else. 

And note the colours of the wires connected to the relay base.

Thanks

Jonathan

The_Dr
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Ok, will do ! 

I'll check it out, and the indicator one, when I get some time over the weekend.

The_Dr
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So the indicator relay was easy to identify by the noise and touching the case. It's on the bottom left of the board (an unmarked relay).

Haven't been able to identify the one that hangs down as yet. I tried all the lights and other electrics but couldn't feel it doing anything.

I'll need to remove it and see what doesn't work..

OldAndrewE
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The diagram on it says it is a changeover relay with a diode across the coil.

This is a similar one on Halfords (not same number though) Halfords HEF559 Relay 12V 40A 5 PIN | Halfords UK 

The suggested applications are listed as:

Electric sunroof / Dashboards / ECU / Automatic transmission / Petrol pump

Central locking / Anti-lock brakes / Air conditioning / Circuit boards

How many of those do you have? Yikes 

Andrew

1985 S3 1700 XFlow.  Undergoing full restoration