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Found a mysterious relay...

 
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felix83  



Joined: 05 Mar 2020
Posts: 12
Location: Sweden

PostPosted: Thu Apr 23, 2020 4:45 pm    Post subject: Found a mysterious relay... Reply with quote

Yesterday I found this relay in the battery box. The wiring going to it looks like it could have been done at the factory, but what does it do? The car has been on SORN since 2008 and I bought it a couple of months ago.
Edit: It's a 1977 Euro car.


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dogleg5  



Joined: 01 Apr 2020
Posts: 29
Location: No longer with us

PostPosted: Sat Apr 25, 2020 11:57 pm    Post subject: Reply with quote

Weird. I've tried searching both the numbers on the relay and nothing. My guesses are, headlight washers, security system, fog lights.
You could try starting the car and turning everything on and then unplug it and see what stops working. If the car dies, then you know it's something with fuel or ignition (which could be security system if you have that).
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Nobbi  



Joined: 24 Aug 2006
Posts: 1361
Location: Germany

PostPosted: Sun Apr 26, 2020 4:39 pm    Post subject: Reply with quote

Hello,

that relay is factory solution for the hot-start issue.I am not sure how it works but it builds up fuel pressure in the lines.

Nobbi
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felix83  



Joined: 05 Mar 2020
Posts: 12
Location: Sweden

PostPosted: Tue Apr 28, 2020 5:21 pm    Post subject: Reply with quote

Nobbi wrote:
Hello,

that relay is factory solution for the hot-start issue.I am not sure how it works but it builds up fuel pressure in the lines.

Nobbi

Thanks! The engine starts fine without it (The ground cable had come off) but I haven't tested how well it starts when warm so that might very well be it. I traced the cable back, and it connects to a sensor at the back of the engine block.
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924RACR  



Joined: 29 Jul 2001
Posts: 8321
Location: Royal Oak, MI, USA

PostPosted: Tue Apr 28, 2020 9:09 pm    Post subject: Reply with quote

That sensor is probably the thermo time switch? Back of the head?

Or is it a 2-prong switch in the coolant line under the ignition coil?
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