Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

4 Pages V < 1 2 3 4 >  
 Reply to this topicStart new topic
> Electric Avenue is Bright, Finishing the ABM Electrics
EdwardBlume
post Jul 14 2015, 01:42 PM
Post #21


914 Wizard
**********

Group: Members
Posts: 12,338
Joined: 2-January 03
From: SLO
Member No.: 81
Region Association: Central California
QUOTE(Jeff Bowlsby @ Jun 17 2015, 02:04 PM) *

Here is my unfused circuits list for a 1974 914.

The unfused items require ignition switch or lights on right?

I should be able to get car off with ignition off, lights off, and doors closed right?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Dave_Darling
post Jul 14 2015, 03:17 PM
Post #22


914 Idiot
**********

Group: Members
Posts: 14,981
Joined: 9-January 03
From: Silicon Valley / Kailua-Kona
Member No.: 121
Region Association: Northern California
Well, there will still be power to many of those things. Not necessarily power going through them and out the other side, but power to them indeed.

--DD
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
EdwardBlume
post Jul 14 2015, 04:05 PM
Post #23


914 Wizard
**********

Group: Members
Posts: 12,338
Joined: 2-January 03
From: SLO
Member No.: 81
Region Association: Central California
Thanks Dave.

I'm trying to run this type of test to check for shorts:
https://m.youtube.com/watch?v=9wLrTjeb9TY

Any thoughts on other methods? Thx
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
EdwardBlume
post Jul 17 2015, 10:35 PM
Post #24


914 Wizard
**********

Group: Members
Posts: 12,338
Joined: 2-January 03
From: SLO
Member No.: 81
Region Association: Central California
So I added all the fuses and put an inline 7.5 amp fuse in the ground line.

100% ignition off, a connection makes the light motors pop on. WTH? The "arc" mentioned earlier was actually the motors...

Any ideas?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
McMark
post Jul 17 2015, 10:41 PM
Post #25


914 Freak!
***************

Group: Retired Admin
Posts: 20,179
Joined: 13-March 03
From: Grand Rapids, MI
Member No.: 419
Region Association: None
Your headlight switch may be wired wrong or busted. We can have a wiring diagram tech session at my farewell BBQ. (IMG:style_emoticons/default/wink.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
ConeDodger
post Jul 17 2015, 10:44 PM
Post #26


Apex killer!
***************

Group: Members
Posts: 23,573
Joined: 31-December 04
From: Tahoe Area
Member No.: 3,380
Region Association: Northern California
(IMG:style_emoticons/default/blink.gif)


Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
EdwardBlume
post Jul 18 2015, 09:09 AM
Post #27


914 Wizard
**********

Group: Members
Posts: 12,338
Joined: 2-January 03
From: SLO
Member No.: 81
Region Association: Central California
QUOTE(McMark @ Jul 17 2015, 09:41 PM) *

Your headlight switch may be wired wrong or busted. We can have a wiring diagram tech session at my farewell BBQ. (IMG:style_emoticons/default/wink.gif)

That'd be cool unless the BBQ is over my cooking wires.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
EdwardBlume
post Jul 18 2015, 09:10 AM
Post #28


914 Wizard
**********

Group: Members
Posts: 12,338
Joined: 2-January 03
From: SLO
Member No.: 81
Region Association: Central California
QUOTE(ConeDodger @ Jul 17 2015, 09:44 PM) *

(IMG:style_emoticons/default/blink.gif)

Thanks for the Sandbox retread Robbie!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Dave_Darling
post Jul 18 2015, 11:52 AM
Post #29


914 Idiot
**********

Group: Members
Posts: 14,981
Joined: 9-January 03
From: Silicon Valley / Kailua-Kona
Member No.: 121
Region Association: Northern California
Either the headlight switch or the headlight motors are wired wrong. There's always power going to the motors, I believe, or at least to the relays. There are microswitches in the housing of the motor (actually on the little gear train I think?) that open and close when the light is open and closed. Plugging stuff in wrong can cause them to keep going...

--DD
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
EdwardBlume
post Jul 19 2015, 04:03 PM
Post #30


914 Wizard
**********

Group: Members
Posts: 12,338
Joined: 2-January 03
From: SLO
Member No.: 81
Region Association: Central California
Some more testing with the inline fuse to ground. The front marker lenses come on and the headlights pop up and stop. Putting them down manually makes them pop up again.

Turning the headlights on does nothing but the rear lamps turn on.

Fogs don't turn on. No turn signal, but the marker light gets brighter.

Ignition on: no change.

I'm wondering if my ignition switch is busted or not plugged in right.

Tried a quick crank, no crank....

Left it on for 2 mins or so, no burning no fires....
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
ConeDodger
post Jul 20 2015, 01:25 PM
Post #31


Apex killer!
***************

Group: Members
Posts: 23,573
Joined: 31-December 04
From: Tahoe Area
Member No.: 3,380
Region Association: Northern California
QUOTE(RobW @ Jul 18 2015, 06:10 AM) *

QUOTE(ConeDodger @ Jul 17 2015, 09:44 PM) *

(IMG:style_emoticons/default/blink.gif)

Thanks for the Sandbox retread Robbie!


Hey! It was my sandbox retread! (IMG:style_emoticons/default/av-943.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
EdwardBlume
post Jul 20 2015, 03:19 PM
Post #32


914 Wizard
**********

Group: Members
Posts: 12,338
Joined: 2-January 03
From: SLO
Member No.: 81
Region Association: Central California
QUOTE(ConeDodger @ Jul 20 2015, 12:25 PM) *

QUOTE(RobW @ Jul 18 2015, 06:10 AM) *

QUOTE(ConeDodger @ Jul 17 2015, 09:44 PM) *

(IMG:style_emoticons/default/blink.gif)

Thanks for the Sandbox retread Robbie!


Hey! It was my sandbox retread! (IMG:style_emoticons/default/av-943.gif)

That's Reno? Figures....
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
blackmoon
post Jul 20 2015, 04:14 PM
Post #33


Member
**

Group: Members
Posts: 153
Joined: 27-May 08
From: Cal Bay Area
Member No.: 9,106
Region Association: None
QUOTE(McMark @ Jul 17 2015, 09:41 PM) *

Your headlight switch may be wired wrong or busted. We can have a wiring diagram tech session at my farewell BBQ. (IMG:style_emoticons/default/wink.gif)


Yes, wiring tech!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
EdwardBlume
post Jul 22 2015, 11:16 AM
Post #34


914 Wizard
**********

Group: Members
Posts: 12,338
Joined: 2-January 03
From: SLO
Member No.: 81
Region Association: Central California
Are these two wires the radio? What gauge wire is speaker wire?


Attached thumbnail(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
McMark
post Jul 22 2015, 09:34 PM
Post #35


914 Freak!
***************

Group: Retired Admin
Posts: 20,179
Joined: 13-March 03
From: Grand Rapids, MI
Member No.: 419
Region Association: None
Those don't look like factory connectors. Is there a radio installed?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Dave_Darling
post Jul 22 2015, 10:07 PM
Post #36


914 Idiot
**********

Group: Members
Posts: 14,981
Joined: 9-January 03
From: Silicon Valley / Kailua-Kona
Member No.: 121
Region Association: Northern California
QUOTE(RobW @ Jul 19 2015, 03:03 PM) *

Some more testing with the inline fuse to ground. The front marker lenses come on and the headlights pop up and stop. Putting them down manually makes them pop up again.


There is power going to the "turn on the headlights" circuit. If the lights go up again, that means there's power still to that circuit. The switch is mis-wired, it sounds like.

Headlight motor circuit:
- If power is applied to the "raise the lights" terminal, the lights go up until the "light is open" microswitch inside stops them. If you crank the light down, as soon as the microswitch gets opened up again from the movement, the motor will run again and keep running (through the "light closed" position) until it gets to the opened position again.
- If power is applied to the "lower the lights" terminal, the lights will go down until the "light is closed" microswitch inside stops them. If you keep the power on to that terminal, and crank the light partway open, the microswitch will eventually open. Then the light will open up the rest of the way and continue until the microswitch again stops it--when the light is closed.

--DD
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
JeffBowlsby
post Jul 22 2015, 10:59 PM
Post #37


914 Wiring Harnesses
*****

Group: Members
Posts: 8,486
Joined: 7-January 03
From: San Ramon CA
Member No.: 104
Region Association: None
QUOTE(RobW @ Jul 22 2015, 10:16 AM) *

Are these two wires the radio? What gauge wire is speaker wire?


Those two go to the "Fasten Seatbelt" light Rob.
User is online!Profile CardPM
Go to the top of the page
+Quote Post
EdwardBlume
post Jul 22 2015, 11:08 PM
Post #38


914 Wizard
**********

Group: Members
Posts: 12,338
Joined: 2-January 03
From: SLO
Member No.: 81
Region Association: Central California
QUOTE(Jeff Bowlsby @ Jul 22 2015, 09:59 PM) *

QUOTE(RobW @ Jul 22 2015, 10:16 AM) *

Are these two wires the radio? What gauge wire is speaker wire?


Those two go to the "Fasten Seatbelt" light Rob.

That makes sense. There's no light anymore so should I tape and tuck them?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
EdwardBlume
post Jul 22 2015, 11:09 PM
Post #39


914 Wizard
**********

Group: Members
Posts: 12,338
Joined: 2-January 03
From: SLO
Member No.: 81
Region Association: Central California
QUOTE(McMark @ Jul 22 2015, 08:34 PM) *

Those don't look like factory connectors. Is there a radio installed?

No, but I need wires for installing a CDR 220? (IMG:style_emoticons/default/cheer.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
EdwardBlume
post Jul 22 2015, 11:13 PM
Post #40


914 Wizard
**********

Group: Members
Posts: 12,338
Joined: 2-January 03
From: SLO
Member No.: 81
Region Association: Central California
QUOTE(Dave_Darling @ Jul 22 2015, 09:07 PM) *

QUOTE(RobW @ Jul 19 2015, 03:03 PM) *

Some more testing with the inline fuse to ground. The front marker lenses come on and the headlights pop up and stop. Putting them down manually makes them pop up again.


There is power going to the "turn on the headlights" circuit. If the lights go up again, that means there's power still to that circuit. The switch is mis-wired, it sounds like.

Headlight motor circuit:
- If power is applied to the "raise the lights" terminal, the lights go up until the "light is open" microswitch inside stops them. If you crank the light down, as soon as the microswitch gets opened up again from the movement, the motor will run again and keep running (through the "light closed" position) until it gets to the opened position again.
- If power is applied to the "lower the lights" terminal, the lights will go down until the "light is closed" microswitch inside stops them. If you keep the power on to that terminal, and crank the light partway open, the microswitch will eventually open. Then the light will open up the rest of the way and continue until the microswitch again stops it--when the light is closed.

--DD

OK. Thanks for the detail. Much appreciated. I'll take a look at the wiring then.

I also have two back up switches (headlight and ignition) on the way in case I need them. I think I'll take the steering, gauges, and lower pad out to see what I can see.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

4 Pages V < 1 2 3 4 >
Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Standard · Switch to: Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 2nd May 2024 - 08:07 AM
Invision Power Board v9.1.4 © 2024  IPS, Inc.
All rights reserved 914World.com © since 2002
914World.com is the fastest growing online 914 community!
We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ...