Update : Electrical Nightmare : 1 issue left, trace gremlins or start over |
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Update : Electrical Nightmare : 1 issue left, trace gremlins or start over |
ri914 |
Oct 21 2020, 07:52 AM
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#1
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Member Group: Members Posts: 102 Joined: 13-August 20 From: rhode island Member No.: 24,593 Region Association: North East States |
Ever have the fuel pump kick on when you turn on the marker lights? how about the headlights deciding to work sporadically coupled with no brake lights or turn signals...
Not sure this is worth trying to track or chase down. I have all the wiring diagrams and everything matches, so I know i have the correct wires. I am thinking my headlight switch is bad and possibly a few other items. I am thinking it might be easier to rewire these functions but willing to give it a few more tries if anyone has been down this road before. Any thoughts or good threads I should study? thank you So many helpful fixes, down to 1 thing left, the turn signals, detailed diagnosis on my last post... |
ri914 |
Oct 21 2020, 07:54 AM
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#2
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Member Group: Members Posts: 102 Joined: 13-August 20 From: rhode island Member No.: 24,593 Region Association: North East States |
Update 1: The fuel pump also cycles with the emergency flashers.
Update 2: No rear lights are working, fuses are all good. |
michelko |
Oct 21 2020, 08:03 AM
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#3
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Senior Member Group: Members Posts: 867 Joined: 30-November 03 From: Germany, Lambsheim Member No.: 1,404 Region Association: None |
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yellowporky |
Oct 21 2020, 08:07 AM
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#4
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Member Group: Members Posts: 427 Joined: 18-October 09 From: Martinez, Ca. Member No.: 10,948 Region Association: Northern California |
Clean every ground post on the car. Power is finding new paths to ground
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ri914 |
Oct 21 2020, 08:17 AM
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#5
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Member Group: Members Posts: 102 Joined: 13-August 20 From: rhode island Member No.: 24,593 Region Association: North East States |
thanks Team, I will clean all the ground posts and see what happens.
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ri914 |
Oct 21 2020, 09:09 AM
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#6
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Member Group: Members Posts: 102 Joined: 13-August 20 From: rhode island Member No.: 24,593 Region Association: North East States |
Update 3: I found a ground ring floating in the engine bay under the circuit/power board behind the driver seat. It had 5 brown wires. Once I attached that correctly. flashers turn signal, hazards and hi beams now all work!!! No random fuel pump operating. I really need to learn more about how an unconnected ground could cause these anomalies.
Fixed the low beam. issue was the fuse not conducting properly. Will upgrade the fuse box to the blade style. Thank you for all the help. |
barefoot |
Oct 21 2020, 09:20 AM
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#7
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Senior Member Group: Members Posts: 1,276 Joined: 19-March 13 From: Charleston SC Member No.: 15,673 Region Association: South East States |
Fixed the low beam. issue was the fuse not conducting properly. Will upgrade the fuse box to the blade style. Thank you for all the help. That' not the correct fuze identification for 914-4's : First fuze (on right) is left headlite hi beam, 2nd is rt hi beam, 3rd is left low beam, 4th is rt low beam |
76-914 |
Oct 21 2020, 09:29 AM
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#8
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,504 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California |
Basically, electricity is always seeking a ground. If one isn’t provided it will find one. We have a bunch of EE’s here that can give you a detailed explanation
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Superhawk996 |
Oct 21 2020, 03:00 PM
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#9
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914 Guru Group: Members Posts: 5,852 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
Clean every ground post on the car. Power is finding new paths to ground (IMG:style_emoticons/default/agree.gif) Unintended ground path are a major source of gremlins |
djway |
Oct 21 2020, 03:13 PM
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#10
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Senior Member Group: Members Posts: 787 Joined: 16-October 15 From: Riverside Member No.: 19,266 Region Association: Southern California |
One thing I have learned after many years with AirCooled
Always start with the grounds......... |
JeffBowlsby |
Oct 21 2020, 04:59 PM
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#11
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914 Wiring Harnesses Group: Members Posts: 8,511 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None |
The fusepanel change to bladed style is not an upgrade.
Just clean and maintain the factory fusepanel and you should have no problems. |
AZBanks |
Oct 21 2020, 05:16 PM
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#12
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Senior Member Group: Members Posts: 1,063 Joined: 7-December 05 From: New River, AZ Member No.: 5,245 Region Association: Southwest Region |
Does anyone have the correct fuse diagram for the 914-4 fuses?
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ri914 |
Oct 21 2020, 05:18 PM
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#13
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Member Group: Members Posts: 102 Joined: 13-August 20 From: rhode island Member No.: 24,593 Region Association: North East States |
The fusepanel change to bladed style is not an upgrade. Just clean and maintain the factory fusepanel and you should have no problems. Thanks Jeff, You just saved me 155.00 I am going to clean them and purchase some new fuses. is there a better way to clean? crc contact cleaner, or should I use a wire brush? |
ri914 |
Oct 21 2020, 05:32 PM
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#14
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Member Group: Members Posts: 102 Joined: 13-August 20 From: rhode island Member No.: 24,593 Region Association: North East States |
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StarBear |
Oct 21 2020, 05:54 PM
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#15
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Senior Member Group: Members Posts: 1,889 Joined: 2-September 09 From: NJ Member No.: 10,753 Region Association: North East States |
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JeffBowlsby |
Oct 21 2020, 06:01 PM
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#16
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914 Wiring Harnesses Group: Members Posts: 8,511 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None |
The fusepanel change to bladed style is not an upgrade. Just clean and maintain the factory fusepanel and you should have no problems. Thanks Jeff, You just saved me 155.00 I am going to clean them and purchase some new fuses. is there a better way to clean? crc contact cleaner, or should I use a wire brush? DeOxit is my go to cleaner. Use a small wire brush also, especially if visually oxidized. |
ri914 |
Oct 27 2020, 02:04 PM
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#17
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Member Group: Members Posts: 102 Joined: 13-August 20 From: rhode island Member No.: 24,593 Region Association: North East States |
Update...
Ok so everyone has helped me get brakes, headlights, high beams, emergency flashers, running lights, markers and fix all the grounds. I had to clean the fuses and replace some. clean bulbs and follow quite a bit of wiring schematics. Also a big thank you to all who spent time sending everything. Sooo.. I only have 1 issue left.... TURN Signals, they used to work when all my grounds where messed up, now nothing. The emergency flashers work and Fuse 9/11 is all good and conductive, but no flashing of the turn signals.. I also noticed the brake light power does not work (for now I ran a wire from fuse 9 to the pedal switch and its all good. Could this be the relay? the turn signal stalk? power not getting to the column? I thought power for the brakes was direct from the fuse? I am at a loss as to what to tear into, last week i did have the right side flasher working. Any help would be great. |
lierofox |
Oct 27 2020, 02:40 PM
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#18
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Member Group: Members Posts: 256 Joined: 23-June 15 From: Paso Robles, CA Member No.: 18,880 Region Association: Southern California |
Brake light switch and turn signals, when the hazard switch knob is pushed in, should receive power from Fuse 9 (on with key On.)
Hazard switch switches over to Fuse 11 (always hot) instead when the knob is pulled out. Are you testing this with the key switched to On? Also, have you pulled down the fuse panel to make sure the spade connectors on the back of the block are plugged in, tight, and free from corrosion? (I'm guessing all of the above is good since you mentioned you've been able to get the brake lights working.) You can try pulling out the hazard switch and probe terminal 15 with the knob pushed in to make sure there's 12v going there, as well as terminal 49. Try taking a look at the wiring going up the steering column to the turn signal stalk, if you peek under the lower dash pad, double check to make sure the connectors there are firmly pushed in all the way. |
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