stcos85 Posted 12July, 2017 Report Share Posted 12July, 2017 Where is the best place to get a wiring diagram for a november 1973 911.Happy to buy a manual as long as its got a decent diagramAlso my headlight switch started smoking today. I think its the dimmer burnt out. Can i wire it so the dimmer part is isolated Link to comment Share on other sites More sharing options...
Peter M Posted 12July, 2017 Report Share Posted 12July, 2017 http://www.pelicanparts.com/911/911_parts/911_electrical_diagrams.htm Are you sure it is the switch smoking? I would think it would be more likely to be one of the unfused dash board light circuits has shorted. However if you remove the switch knob and the switch mounting ring, you should be able to remove the switch while it is still connected to wiring and examine. Good luck! Link to comment Share on other sites More sharing options...
stcos85 Posted 12July, 2017 Author Report Share Posted 12July, 2017 I tried all the wires seperately and was able to get the dash lights to work bypassing the switch so they were alright.The switch is out and i can see the windings have burnt out.I will have a look at the link you posted.I think there is a seperate power feed for the dimmer but not sure Link to comment Share on other sites More sharing options...
Skidmarks Posted 12July, 2017 Report Share Posted 12July, 2017 Where is the best place to get a wiring diagram for a november 1973 911.Happy to buy a manual as long as its got a decent diagramAlso my headlight switch started smoking today. I think its the dimmer burnt out. Can i wire it so the dimmer part is isolatedI've found the Haynes manual pretty good. Link to comment Share on other sites More sharing options...
Ashbaxter Posted 12July, 2017 Report Share Posted 12July, 2017 As the dash lights are not fused any short will smoke up the light switch, I had that happen. There is a mod to put a fuse in in that circuit on Pelican from memory Link to comment Share on other sites More sharing options...
Peter M Posted 13July, 2017 Report Share Posted 13July, 2017 Yes, a fuse on the dimable dash lights circuit and a fuse on the ashtray light circuit is a prudent modification while you are there - assuming the earlier cars are anything like the later G series cars. Link to comment Share on other sites More sharing options...
Russ Posted 13July, 2017 Report Share Posted 13July, 2017 a general but sort of related question - does the light switch have a full 12v running to it? rather than a relay? Link to comment Share on other sites More sharing options...
Peter M Posted 13July, 2017 Report Share Posted 13July, 2017 Yes Russ and the hi/Lo switch also carries the full current as well as the switch. I've recent added a set of relays and the difference has been night and day......sorry( I used a J West relay kit but a bit of time and 30 bucks of wire, connectors and relays would do the same thing) Link to comment Share on other sites More sharing options...
OZ930 Posted 14July, 2017 Report Share Posted 14July, 2017 Another way to reduce current draw from the dash lights is to change to leds. Link to comment Share on other sites More sharing options...
stcos85 Posted 4August, 2017 Author Report Share Posted 4August, 2017 The elec found a short behind the headlight that had been causing all the issues, even causing the wipers to operate as soon as the ignition was switched on. The light switch had a different labelled terminal on it so I refitted the old switch and so far all good. I will fit the fuse as advised.now my problem is the reverse light. I have had the gearbox rebuilt and refitted so would have expected that to work. I get power to one side of the switch but when I put it in reverse i get no power to the other side. I assume it has to be the switch having had the gearbox rebuilt. any ideas. Link to comment Share on other sites More sharing options...
Shady Speedway Posted 5August, 2017 Report Share Posted 5August, 2017 Wiring diagrams are buried in the pelican parts website. Link to comment Share on other sites More sharing options...
OZ930 Posted 5August, 2017 Report Share Posted 5August, 2017 The elec found a short behind the headlight that had been causing all the issues, even causing the wipers to operate as soon as the ignition was switched on. The light switch had a different labelled terminal on it so I refitted the old switch and so far all good. I will fit the fuse as advised.now my problem is the reverse light. I have had the gearbox rebuilt and refitted so would have expected that to work. I get power to one side of the switch but when I put it in reverse i get no power to the other side. I assume it has to be the switch having had the gearbox rebuilt. any ideas.Check that the pin (pushrod) is being pushed the appropriate distance to operate the switch contacts and that the pin is the correct length.I bought a new switch and had this problem. Turned out that the switch required too much movement to operate. Bad batch apparently. Link to comment Share on other sites More sharing options...
stcos85 Posted 5August, 2017 Author Report Share Posted 5August, 2017 Check that the pin (pushrod) is being pushed the appropriate distance to operate the switch contacts and that the pin is the correct length.I bought a new switch and had this problem. Turned out that the switch required too much movement to operate. Bad batch apparently.how do i know how long the pin should be Link to comment Share on other sites More sharing options...
OZ930 Posted 5August, 2017 Report Share Posted 5August, 2017 how do i know how long the pin should becan't remember or find the answer to that one yet. There is an article on Pelican somewhere that explains it.I should have asked, what model gearbox? Did they replace the switch, do you still have the old one? Link to comment Share on other sites More sharing options...
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