 Dash / Instrument Lights Problem Unresolved |
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| JimVG |
 Mar 10 2025, 12:59 PM
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Newbie  Group: Members Posts: 38 Joined: 10-October 24 From: Gig Harbor, WA Member No.: 28,402 Region Association: Pacific Northwest 
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I have researched this problem on this site, and I still cannot correct the issue of no dash/instrument lights on a 1973 914.
The Problem When key is ON, and the headlight switch is in the ON position none of the instrument light bulbs illuminate. Turning the headlight switch dimmer has no effect. All fuses tested functional. Testing Procedure Using a test light that is properly grounded with the headlight switch ON and the dimmer turned to HIGH: There is no power to headlight switch terminal 58a or 58b (Fuse #7 is functional). Using a separate test wire with a working bulb connected to headlight switch terminal 58b and the opposite end plugged into an instrument bulb socket the bulb does not illuminate. Using the same test wire connected to terminal headlight switch 56k (empty and has power) plugged into the same instrument bulb socket the bulb does illuminate (dimmer not functional). Please advise. Your time and consideration is appreciated! |
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| JeffBowlsby |
Mar 11 2025, 07:44 AM
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#2
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914 Wiring Harnesses Group: Members Posts: 8,846 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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| JimVG |
Mar 11 2025, 08:08 AM
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#3
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Newbie Group: Members Posts: 38 Joined: 10-October 24 From: Gig Harbor, WA Member No.: 28,402 Region Association: Pacific Northwest
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QUOTE(JeffBowlsby @ Mar 11 2025, 08:44 AM)  Thank you, Jeff. I found your previous posts. My car is a 1973 with an 11 blade switch as shown on your 1974 diagram. I attempted to simply bypass the rheostat by connecting together the wires that were on 58a and 58b as you have suggested, but that did not illuminate the instrument lights. I am not concerned with restoring the dimmer function. What headlight switch terminal would be best to take power from that would allow instrument illumination when the parking lights and/or the headlights are on and still be a safe connection? I have read where others attempting this have had electrical problems (blown fuses and under-dash fires), so I want to insure that I am avoiding that possibility at all costs! Thanks again! |
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Posts in this topic
JimVG Dash / Instrument Lights Problem Unresolved Mar 10 2025, 12:59 PM
emerygt350 I would suspect your switch dimmer is bad. I pull... Mar 10 2025, 01:27 PM
ClayPerrine
I would suspect your switch dimmer is bad. I pul... Mar 10 2025, 01:52 PM barefoot
I would suspect your switch dimmer is bad. I pu... Mar 10 2025, 03:38 PM JimVG
[quote name='ClayPerrine' post='3195739' date='Ma... Mar 11 2025, 06:39 AM emerygt350
[quote name='ClayPerrine' post='3195739' date='M... Mar 11 2025, 06:56 AM JeffBowlsby Do you have power at 58b? You should, and if so, ... Mar 11 2025, 12:35 PM JimVG I used a "Power Probe III" to trace the ... Mar 11 2025, 02:32 PM |
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