 Ignition switch schematic?, PP & Haynes don't cut it |
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| 3d914 |
 Nov 7 2012, 06:43 PM
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#1
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Senior Member  Group: Members Posts: 1,275 Joined: 24-September 03 From: Benson, AZ Member No.: 1,191 Region Association: Southwest Region  |
I need a complete schematic of the stock ignition switch for 70-76. Already been through the elec diagrams on PP & Haynes - but not what I need. The Haynes one would work if they didn't split it up across two pages.
Also the other thing I need to verify (appears to be the case) - does the switch have mulit-decks? Meaning are there multiple circuits for each of the 3 positions (Off, run, & start)? TIA, |
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| larryM |
 Nov 7 2012, 07:29 PM
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#2
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emoze Group: Members Posts: 891 Joined: 1-January 03 From: mid- California Member No.: 65 Region Association: Northern California 
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well, yes,
and, maybe not all yrs 70-76 had the same switch wiring set as best I can tell - essentially the same switch as VW & also 911 used - but annual "upgrades" I have spent 30+ yrs haggling with this issue - have lots of schematics & hand-drawings bases on actual circuit testing - based on having fiddled with this problem on at least 15 914's of various yrs & origin I will look at all my old notes and see what i can find to help i am currently revisiting wiring issues as i do a 3.2 motronic upgrade - l it's an end-to-end ohmeter excercise at the least . |
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| 76-914 |
Nov 7 2012, 08:48 PM
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#3
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,500 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California
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IIRC, Brad the DJet Oracle has a write up on those at his website with some good pic's. http://members.rennlist.com/pbanders/headl...h_internals.htm. There are different switch's depending upon the year
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| 3d914 |
Nov 7 2012, 09:12 PM
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#4
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Senior Member Group: Members Posts: 1,275 Joined: 24-September 03 From: Benson, AZ Member No.: 1,191 Region Association: Southwest Region |
Thanks larry. 76 - the link is for the headlight switch. I'm after the ignition switch.
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| JeffBowlsby |
Nov 8 2012, 11:07 AM
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#5
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914 Wiring Harnesses Group: Members Posts: 8,505 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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Its in the factory manual...
Attached image(s) 
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| 3d914 |
Nov 8 2012, 01:27 PM
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#6
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Senior Member Group: Members Posts: 1,275 Joined: 24-September 03 From: Benson, AZ Member No.: 1,191 Region Association: Southwest Region |
Jeff, does that schematic indicate clearly whether it has multiple decks? The incoming side (30) apears to be a single input circuit.
One other thought. Does the 914/6's panel mounted key cylinder take the similar ignition switch used in the 4's (didn't see a separate one for 6's in parts catalog)? |
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| SLITS |
Nov 8 2012, 02:09 PM
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#7
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None  |
QUOTE(3d914 @ Nov 8 2012, 11:27 AM)  Jeff, does that schematic indicate clearly whether it has multiple decks? The incoming side (30) apears to be a single input circuit. One other thought. Does the 914/6's panel mounted key cylinder take the similar ignition switch used in the 4's (didn't see a separate one for 6's in parts catalog)? The 914/6 is completely different .... early 911 style |
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| JeffBowlsby |
Nov 8 2012, 02:13 PM
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#8
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914 Wiring Harnesses Group: Members Posts: 8,505 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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'Multiple decks' is a physical construction question...I dunno, take one apart to find out. Use an ohmmeter to verify the electrical function....
The /6 switch is different than the /4...thats all I know about it... |
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| Nine_14 |
Nov 8 2012, 02:43 PM
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#9
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Member Group: Members Posts: 311 Joined: 30-August 12 From: Germany Member No.: 14,873 Region Association: Germany |
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| 3d914 |
Nov 9 2012, 06:58 PM
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#10
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Senior Member Group: Members Posts: 1,275 Joined: 24-September 03 From: Benson, AZ Member No.: 1,191 Region Association: Southwest Region |
OK, the factory switch schematic helped me, so I think I figured this out together with the switch schematic for the SHO. Here's a schematic I drew up to handle my minimum requirements. There are two separate input circuits and two separate conditions for the start/run circuit for each. This is why I needed a two-deck rotary switch.
 The more I studied it and looked at various switches in catalogs, it dawned on me that I can replicate these circuits with two separate toggle switches. One DPST to handle the two input circuits, and one SPST momentary switch to provide the start function. It turns out this can serve the role of the clutch position switch also.  This will take care of the engine bench test, but I'll still need to take apart a stock switch to build a schematic of it so I can use it when engine is installed. Thanks for the help. |
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