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Author: Subject: Wiring relay
myke pocock

posted on 19/6/21 at 06:46 PM Reply With Quote
Wiring relay

Having asked a question recently about DRLs I am fitting to my MX5 I have decided on the following:
I will take an ignition controlled live (which I will fuse) from the fuse box to power the DRLs so that they come on when the ignition is turned on. I want them to go off completely when the headlights are turned on so intend taking a feed from the headlight wiring. To do this I have been advised to use a 5 blade change over relay which I have. Question is how do I wire it? Can anyone advise what goes to which numbered blade on the relay please making it understandable for an electrical numpty ie; me! Thanks in anticipation.

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cliftyhanger

posted on 19/6/21 at 09:06 PM Reply With Quote
Pin 30 is your power supply.
87a to the drl +ve
86 from sidelight supply (goes live when sidelights on)
85 earth
87 should be insulated/unused (but will go live when sidelights on)

Others may do it differently? The relay is merely to switch the DRLs off when the sidelights go on.

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gremlin1234

posted on 21/6/21 at 10:09 AM Reply With Quote
what is the wiring loom based on?
do you already have a relay for the sidelights?

one note, a relay is simply: an electrically actuated switch.

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