Tach/Turn signal conversion doesn't work, Got it working - different than the Up 'n Fixin diagram, though |
|
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. |
|
Tach/Turn signal conversion doesn't work, Got it working - different than the Up 'n Fixin diagram, though |
sfrenck |
Jul 28 2013, 12:01 PM
Post
#1
|
Member Group: Members Posts: 492 Joined: 28-February 10 From: Wilmington, DE Member No.: 11,411 Region Association: MidAtlantic Region |
Used this information to install my 73 Tach into my 74 car:
You would add two wires from the emergency flasher switch to the bulbs you will use (green/black and white/ black). These are the same wires and colors leading out to the turn signal bulbs at the four corners of the car. You will modify the existing blue/white wire to extend to the other side of BOTH bulbs. The blue/white wire terminates at the flasher relay itself. Weird thing is when all the wires are connected to the hazard switch, neither indicator works for flasher or turn signal. If I unplug the L or R from the hazard switch, both turn signal indicators work as they are supposed to and one of them lights up with the hazard (whichever one I didn't unplug)? I've already switched out the hazard switch. (IMG:style_emoticons/default/WTF.gif) Newer Update: All works if I detach the blue wire w/ white stripe from the turn indicator bulbs and instead install a ground to them. Guess I'm going with this solution rather than the diagram above indicating I need the two blue/white stripe (or, as indicated below, take the blue/white wire off of the flasher at terminal K and connect the wire to ground). |
904svo |
Jul 28 2013, 01:43 PM
Post
#2
|
904SVO Group: Members Posts: 1,118 Joined: 17-November 05 From: Woodstock,Georgia Member No.: 5,146 |
Reverse the left and right leads to the turn singal bulbs and try that.
|
Spoke |
Jul 28 2013, 01:55 PM
Post
#3
|
Jerry Group: Members Posts: 6,991 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
If I unplug the L or R from the hazard switch, both turn signal indicators work as they are supposed to and one of them lights up with the hazard (whichever one I didn't unplug)? I've already switched out the hazard switch. (IMG:style_emoticons/default/WTF.gif) You Wrote: "If I unplug the L or R from the hazard switch, both turn signal indicators work" Do you mean if you unplug either wire from the bulbs to the hazard switch, they both work? If so, you have a wiring error. Looking at the diagram you provided, if either wire from the bulbs to the switch are unplugged, then current cannot flow through that bulb and that bulb cannot light up. |
sfrenck |
Jul 28 2013, 02:36 PM
Post
#4
|
Member Group: Members Posts: 492 Joined: 28-February 10 From: Wilmington, DE Member No.: 11,411 Region Association: MidAtlantic Region |
If I unplug the L or R from the hazard switch, both turn signal indicators work as they are supposed to and one of them lights up with the hazard (whichever one I didn't unplug)? I've already switched out the hazard switch. (IMG:style_emoticons/default/WTF.gif) You Wrote: "If I unplug the L or R from the hazard switch, both turn signal indicators work" Do you mean if you unplug either wire from the bulbs to the hazard switch, they both work? If so, you have a wiring error. Looking at the diagram you provided, if either wire from the bulbs to the switch are unplugged, then current cannot flow through that bulb and that bulb cannot light up. Hmm... after further playing it seems that the hazard switch making the indicators blink is the issue. The turn signals work (power comes from the turn signal, not the hazard switch) in all cases. |
sfrenck |
Jul 29 2013, 04:58 PM
Post
#5
|
Member Group: Members Posts: 492 Joined: 28-February 10 From: Wilmington, DE Member No.: 11,411 Region Association: MidAtlantic Region |
Bump for question change in initial post.
|
904svo |
Jul 29 2013, 05:56 PM
Post
#6
|
904SVO Group: Members Posts: 1,118 Joined: 17-November 05 From: Woodstock,Georgia Member No.: 5,146 |
Look at the drawing, blue/white supply pulsing +12 to both turn signal lamps.
Then the return ground to the turn signal bulbs go to the opposite light, ie left gets its ground from right turn bulb and right from the left turn bulb. Hope this helps. |
Mike Bellis |
Jul 29 2013, 10:07 PM
Post
#7
|
Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None |
You could take the Blue/White wire off the relay (Terminal K)and ground it. Just the wire, not terminal K.
Make sure you have 2 wire lamp sockets and the terminals are not grounded. The sockets should only be grounded if they are single wire. In which case, just remove the wire from terminal K. |
sfrenck |
Aug 4 2013, 11:11 AM
Post
#8
|
Member Group: Members Posts: 492 Joined: 28-February 10 From: Wilmington, DE Member No.: 11,411 Region Association: MidAtlantic Region |
You could take the Blue/White wire off the relay (Terminal K)and ground it. Just the wire, not terminal K. Make sure you have 2 wire lamp sockets and the terminals are not grounded. The sockets should only be grounded if they are single wire. In which case, just remove the wire from terminal K. This method works. |
Mike Bellis |
Aug 4 2013, 12:28 PM
Post
#9
|
Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None |
You could take the Blue/White wire off the relay (Terminal K)and ground it. Just the wire, not terminal K. Make sure you have 2 wire lamp sockets and the terminals are not grounded. The sockets should only be grounded if they are single wire. In which case, just remove the wire from terminal K. This method works. There is no way the schematic you posted could work without adding diodes into the system to prevent current back feeding. Not sure where you found it but it is drawn wrong. |
Spoke |
Aug 4 2013, 04:43 PM
Post
#10
|
Jerry Group: Members Posts: 6,991 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
Newer Update: All works if I detach the blue wire w/ white stripe from the turn indicator bulbs and instead install a ground to them. Guess I'm going with this solution rather than the diagram above indicating I need the two blue/white stripe (or, as indicated below, take the blue/white wire off of the flasher at terminal K and connect the wire to ground). I wired my 74 with early tach in the same way. Essentially you are just paralleling the dash indicators with the outside turnsignal bulbs. |
Dave_Darling |
Aug 4 2013, 07:30 PM
Post
#11
|
914 Idiot Group: Members Posts: 14,991 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
The font and style make the diagram look like it came out of an issue of Panorama. Not one I'm familiar with, though.
--DD |
sfrenck |
Aug 5 2013, 05:40 AM
Post
#12
|
Member Group: Members Posts: 492 Joined: 28-February 10 From: Wilmington, DE Member No.: 11,411 Region Association: MidAtlantic Region |
You could take the Blue/White wire off the relay (Terminal K)and ground it. Just the wire, not terminal K. Make sure you have 2 wire lamp sockets and the terminals are not grounded. The sockets should only be grounded if they are single wire. In which case, just remove the wire from terminal K. This method works. There is no way the schematic you posted could work without adding diodes into the system to prevent current back feeding. Not sure where you found it but it is drawn wrong. Got it from this discussion - Turn Signal Indicators, 2 instead of 1 Note: thread indicates the diagram is from "UpFixin vol IX on Pages 171 and 172" |
Lo-Fi Version | Time is now: 8th June 2024 - 10:00 AM |
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 ... |