mcc1979ian Posted October 15, 2023 Share Posted October 15, 2023 Afternoon chaps, Iv finally got my arse in gear and am getting on with the wiring in my 90. I’m currently up to fitting the raptor dash and it’s switches & gauges but Iv come across a plug where someone’s decided to install a couple of scotch type connectors but they ain’t plugged to anything. My question is what is the purple and white wires their connected to for? Quote Link to comment Share on other sites More sharing options...
Snagger Posted October 15, 2023 Share Posted October 15, 2023 I think they are for the courtesy light door switches, as those use purple, but I can’t remember if they were purple with a “trace” (stripe) or if anything else had purple - I have a nagging feeling the horn uses purple too. 1 Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted October 15, 2023 Share Posted October 15, 2023 Reposing something Monkie posted ages ago: Quote G=green, LG = light green, R=red, U=blue, W=white, O=orange, P=purple, N =brown, B=black, Y=yellow, S=slate(grey), K=pink. G fused ignition on GR left turn signal GW right turn signal GP brake lights GN reverse light GB fuel sender GY heater blower motor switch GS heater blower motor switch LGG oil temperature LGW oil pressure sender LGB screen wash pump LGP trailer warning light LGN hazard switch to flash relay R running lights RO right side/tail RB left side/tail RY rear fog RLG wiper motor RW gauge & panel illumination U head lights UO right main US left main UK left dip UB right dip UG wiper motor W unfused live ignition on WR ignition switch to starter relay WO ignition switch to heater blower fuse and radio WB rear window heater WS fuel sender to guage WN oil pressure warning lamp WY hand brake warning light WG Heated rear window switch to relay/dash light P unfused permanent live PG fuse to heater blower motor PO seat belt warning light (where fitted) PW interior cab light PU door switch (where fitted) N permanent live from positive terminal bus on starter solenoid NLG wiper motor NY charge warning light NLG flasher relay NW fuse to heated rear window relay B earth BU diff lock engaged warning light BW brake warning light BR hazard switch illumination BK heated rear window relay to diode BS heated rear window diode to voltage sensitive switch YB Glowplug Feed 1 Quote Link to comment Share on other sites More sharing options...
mcc1979ian Posted October 15, 2023 Author Share Posted October 15, 2023 4 hours ago, FridgeFreezer said: Reposing something Monkie posted ages ago: Cheers, that’s handy to have. I wonder what they’ve been used for 🤔 Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted October 16, 2023 Share Posted October 16, 2023 15 hours ago, mcc1979ian said: Cheers, that’s handy to have. I wonder what they’ve been used for 🤔 I believe it's BS au187 standard wiring so crops up on a ton of cars made for a period of a few decades or more, although I'm certain there's a fair bit of deviation from it especially in later years as more and more stuff got bolted in to cars. 1 Quote Link to comment Share on other sites More sharing options...
Peaklander Posted October 16, 2023 Share Posted October 16, 2023 The purple-white cable is used in the interior light circuit. It is connected on the 0 volt side of the light, when the switch is in door position. It doesn’t go directly to the battery / chassis 0v connection. It goes to the 10AS unit that controls those lights. When a door opens, or a key fob ‘unlock’ is pressed, the lights are turned on. The 10AS then decides when to switch them off. It does this by controlling the voltage on that PW wire. The lamps go off when ignition is turned on, or after the doors are closed (15secs) or if they are left open, after 15 mins or something. This all supposes that it is original wiring and someone hasn’t stuck a PW cable in there as a curve ball. 1 Quote Link to comment Share on other sites More sharing options...
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