 Brain Trust Help needed on Parking Brake Light, Parking Brake Light Always on...... |
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| Gatornapper |
 Jul 4 2025, 07:40 PM
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Senior Member  Group: Members Posts: 1,283 Joined: 22-September 17 From: Woods west of Richmond, VA Member No.: 21,449 Region Association: South East States 
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Once again need the help of the great 914 Brain Trust here........
My Parking Brake Light stays on all the time. The switch is fairly new and it is functioning properly. Disconnecting the brown (ground) wire to the switch, it has no continuity or resistance to ground. So it is not "grounded out" somewhere. I see in my great 914 electrical schematic of the ground circuit for the switch and light that there are two diodes in the circuit. I am guessing that one of them failed. Can anyone tell me where these two diodes are located? Or where else the problem might be? As always, TIA, GN |
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| Gatornapper |
Sep 2 2025, 07:58 AM
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Senior Member Group: Members Posts: 1,283 Joined: 22-September 17 From: Woods west of Richmond, VA Member No.: 21,449 Region Association: South East States
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Finally got car on lift to find that there was no reset and sensor had strange resistance of about 300k ohms.
Disconnected it and yes light finally went out. Someday I'll replace the sensor, don't see it as urgent need. Thanks to all for help on this. GN |
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| Spoke |
Sep 2 2025, 08:54 AM
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#3
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Jerry Group: Members Posts: 7,238 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None
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QUOTE(Gatornapper @ Sep 2 2025, 09:58 AM)  Finally got car on lift to find that there was no reset and sensor had strange resistance of about 300k ohms. Disconnected it and yes light finally went out. Someday I'll replace the sensor, don't see it as urgent need. Thanks to all for help on this. GN Good to hear. Sounds like the switch is electrically leaky. |
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Posts in this topic
Gatornapper Brain Trust Help needed on Parking Brake Light Jul 4 2025, 07:40 PM
jim_hoyland MC ?
I just went through this… :) Jul 4 2025, 08:41 PM
Jamie
MC ?
I just went through this… :)
I'm also... Jul 5 2025, 09:03 AM Superhawk996
I'm also trying to troubleshoot the flashing... Jul 5 2025, 12:25 PM Literati914 @Gatornapper - if you pull the combo gauge, you... Jul 5 2025, 10:01 AM Gatornapper Ah yes! On my schematic it does look like one... Jul 5 2025, 10:47 AM BillC
What is "MC"?
"MC" is short ... Jul 5 2025, 11:05 AM Literati914
What is "MC"?
"MC" is short... Jul 5 2025, 12:10 PM Superhawk996 Simplified schematic from Spoke Jul 5 2025, 12:23 PM Gatornapper Ah, yes.
Thank you SH for the schematic.
NO diod... Jul 9 2025, 05:44 AM Spoke For the MC warning switch, you can disconnect the ... Jul 9 2025, 06:36 AM Gatornapper Thanks Spoke.
Light still flashes with brake wire... Jul 11 2025, 06:41 AM 914 Is there a reset button/Switch on the Master Cyl?
... Jul 11 2025, 07:23 AM Jamie
Is there a reset button/Switch on the Master Cyl?... Jul 11 2025, 08:55 AM Gatornapper I'll do the same. Lift presently occupied pre... Jul 14 2025, 03:14 PM Superhawk996
What in the world does this wire to the MC do? ... Jul 14 2025, 05:47 PM Gatornapper SH -
Have electrical schematics for '87 944?
... Jul 20 2025, 01:56 PM Superhawk996
SH -
Have electrical schematics for '87 944?... Jul 20 2025, 02:38 PM Cairo94507 On my MC there is- ATE. :beer2: Jul 11 2025, 08:06 AM Gatornapper Change of subject as I have no where else to go: ... Jul 17 2025, 06:07 AM Literati914 I have the same issue with the stupid flashing lig... Jul 17 2025, 12:35 PM Gatornapper Thanks.
Gonna unplug mine - if there is one. My ... Jul 17 2025, 07:28 PM Superhawk996
No need for warning light.
:blink: :headbang... Jul 17 2025, 10:18 PM Superhawk996
I’d say ‘don’t be surprised if there is n... Jul 17 2025, 10:14 PM Literati914
I’d say ‘don’t be surprised if there is ... Jul 21 2025, 08:12 AM Superhawk996
[quote name='Literati914' post='3215412' date='J... Jul 21 2025, 10:13 AM Literati914
.. [i]They all have some type of a square plastic... Jul 21 2025, 04:01 PM Superhawk996
Were there EARLY two-pole switches with manual b... Jul 21 2025, 04:27 PM Lucky9146 Finding this thread helpful in diagnosing my own s... Jul 21 2025, 08:58 PM |
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