mmt 14 Posted January 22, 2019 Hi guys Bought a plug and play set of wires for the head lights. No original wires in the car. The drawing from the box says: Relay 85 to Ground , 87 to lamps, 30 to positive and 86 to switch. Here comes My question: How do I wire the switch? I have a switch with 2 terminals and a switch with 3 terminals. The 86 wire to one terminal and then what where? Which switch should I use? I’m only after on/off. Thanks. Share this post Link to post Share on other sites
SRDT 146 Posted January 22, 2019 +12v (fused) to the switch (the 2 terminals one) then to 86. As 85 is Ground 86 must be +12v used for command. But aren't you talking about the driving lights under the bumper? Share this post Link to post Share on other sites
mmt 14 Posted January 23, 2019 It’s for the main headlamps. Only to turn them on/off. Track car only. The positive (30 slot) is in line fused. The box came with a 3 terminal switch. Share this post Link to post Share on other sites
mmt 14 Posted January 24, 2019 (edited) Like this? Wonder if the 3 legged toggle switch is a better setup? Edited January 24, 2019 by mmt Share this post Link to post Share on other sites
SRDT 146 Posted January 24, 2019 With this schematic you need to use a big fuse so you don't really protect the switch and relay coil. There is more than one kind of 3 terminal switch: it could be a ON-OFF-ON one or a ON-OFF with a light indicator. Share this post Link to post Share on other sites
jackherer 543 Posted January 24, 2019 He means a big value fuse, the wire to the bulbs has e.g. 10A going through it but the wire to the switch just has a few milliamps to drive the coil in the relay so it should have its own smaller (value in amps) fuse. Share this post Link to post Share on other sites
mmt 14 Posted January 25, 2019 Great Thanks. The bulbs Will get the 15 A fuse which came with the wires. The switch Will get a 5 A fuse. Share this post Link to post Share on other sites
