 Gauge wiring woes |
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| carking1996 |
 Jul 30 2018, 12:49 PM
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#1
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Member  Group: Members Posts: 69 Joined: 15-September 16 From: Ohio Member No.: 20,399 Region Association: North East States  |
I've been trying to figure out why none of my gauges or illumination lights work on my 75 914. Only one light on the cluster seems to work. The headlight on (one first click, though) light on the speedo. I've checked grounds, all clean. Checked wires, mostly good besides the tachometer having a 'double' red/white wire instead of one (could that be a problem?). Everything else looks fine and I don't see a reason none of it wouldn't be working besides that one light. Thanks for any insight
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| 914Sixer |
Jul 30 2018, 01:04 PM
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#2
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914 Guru Group: Members Posts: 8,877 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region 
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What year car? Early cars 70-72 have 911 style bulb wiring, different from later.
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| carking1996 |
Jul 30 2018, 01:05 PM
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#3
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Member Group: Members Posts: 69 Joined: 15-September 16 From: Ohio Member No.: 20,399 Region Association: North East States |
QUOTE(914Sixer @ Jul 30 2018, 03:04 PM)  What year car? Early cars 70-72 have 911 style bulb wiring, different from later. Oops. Year is 1975 |
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| carking1996 |
Jul 31 2018, 09:47 AM
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#4
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Member Group: Members Posts: 69 Joined: 15-September 16 From: Ohio Member No.: 20,399 Region Association: North East States |
Bump (IMG:style_emoticons/default/icon_bump.gif)
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| Dave_Darling |
Jul 31 2018, 10:31 AM
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#5
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914 Idiot Group: Members Posts: 14,983 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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According to the 75-76 wiring diagram, the red/white wires also power several of the warning lights. Like the oil pressure light, the charging system light, the low fuel light, and so on.
It looks like there is one daisy-chained wire that powers the following: - Tach - Oil pressure light - Fuel gauge - Low fuel light - Alternator warning light This comes from fuse #9, which has three wires crimped into one connector: Red/White for all of the above, red/white to power one part of the turn signal switch, black/yellow to power center console voltmeter and temp gauge if present and also parts of the taillights. Gauge illumination power comes from the black/blue wires, which are fed from the headlight switch. --DD |
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| carking1996 |
Aug 1 2018, 09:16 AM
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#6
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Member Group: Members Posts: 69 Joined: 15-September 16 From: Ohio Member No.: 20,399 Region Association: North East States |
After all this time is was just two wires on the fuse box switched that caused it not to work! Thank you so much!
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