Richard Herefordshire Posted August 1, 2014 Share Posted August 1, 2014 Hi AllRecently purchased a MK3 Spitfire and I have an extra switch in the dashboard which is wired into this relay. Can you please tell me which relay this is and why you would have a switch added to this?Thanks very much in advance. Quote Link to comment Share on other sites More sharing options...
thescrapman Posted August 1, 2014 Share Posted August 1, 2014 That is not standard, the other one below is horn.I would guess at Overdrive?? Though I thought that relay usually bolts the other side of the butress to the horn.Screws look original though.What colours are the wires?? Quote Link to comment Share on other sites More sharing options...
Richard Herefordshire Posted August 1, 2014 Author Share Posted August 1, 2014 I thought it was overdrive relay but I couldn't understand why someone would want to cut the power to it? Quote Link to comment Share on other sites More sharing options...
Richard Herefordshire Posted August 1, 2014 Author Share Posted August 1, 2014 Wire colours:-BlackRed/Green (power from starter solenoid)Red/BlackGreen Quote Link to comment Share on other sites More sharing options...
piman Posted August 2, 2014 Share Posted August 2, 2014 Hello Richard, black is earth, red/green is normally a bulb failure, red/black is normally Left-hand, sidelamp fuse to side and tail lamps and number plate illumination and green is ignition switched fused supply.It doesn't sound as though the wires are relevant to the relay's function?Alec Quote Link to comment Share on other sites More sharing options...
stevegt6 Posted August 2, 2014 Share Posted August 2, 2014 wire switch to relaywire starter sol to relaywire earth to relay..???where does the remaining wire go..??? Quote Link to comment Share on other sites More sharing options...
DougBGT6 Posted August 2, 2014 Share Posted August 2, 2014 Is this a hazard warning relay? Hazards weren't mandatory on cars this early, but it could be an optional extra. Hazards have to work with the ignition off so I would check to see if there's voltage on any of the relay pins with the ignition off (red/green?). Is the switch actually connected to the relay? Also I your black wire appears much thinner than the others, odd for an earth wire, maybe the relay gets it's earth by being screwed to the bulk head? So is black really earth? Quote Link to comment Share on other sites More sharing options...
Mj17 Posted August 4, 2014 Share Posted August 4, 2014 No-one's asked the obvious yet - where do the wires go...? Quote Link to comment Share on other sites More sharing options...
stevegt6 Posted August 5, 2014 Share Posted August 5, 2014 Mj17 wrote:No-one's asked the obvious yet - where do the wires go...?I did :P Quote Link to comment Share on other sites More sharing options...
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