 reverse light switch, high resistance and leaks, why? |
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| davesprinkle |
 Feb 5 2009, 01:52 PM
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Senior Member  Group: Members Posts: 720 Joined: 13-October 04 From: Berkeley, CA Member No.: 2,943 Region Association: None 
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OK, I'm now on my third reverse switch, with a consistent problem:
After a few hundred miles, the switch contacts become high-resistance (50 Ohms or so) and the switch leaks tranny fluid, filling up the wiring boot. By the way, the last two switches were brand-new Porsche replacements. I'm running Swepco 201, by the way. Anybody have any suggestions about what might be going on? |
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| jk76.914 |
Apr 19 2009, 09:35 AM
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Senior Member Group: Members Posts: 809 Joined: 12-April 05 From: Massachusetts Member No.: 3,925 Region Association: North East States |
This is VERY timely.
Mine did the same thing. Sat for maybe 3 years, then when I got the drivetrain back in, it didn't work. I don't know why, but I'm cutting mine apart to see what broke. I waiting for my new one before I start cutting, because I'm using the old one as a plug so I can drive until then. My pin measures 1.141". My switch pushes smoothly, against the spring, but I have to bottom it out and press kinda hard to get the contacts to close (measured with an ohmmeter). I'm ordering a new one today. Pelican has them for $72.25. 62 in stock. Jim |
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| davesprinkle |
Apr 19 2009, 10:23 AM
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Senior Member Group: Members Posts: 720 Joined: 13-October 04 From: Berkeley, CA Member No.: 2,943 Region Association: None
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QUOTE(jk76.914 @ Apr 19 2009, 08:35 AM)  This is VERY timely. Mine did the same thing. Sat for maybe 3 years, then when I got the drivetrain back in, it didn't work. I don't know why, but I'm cutting mine apart to see what broke. I waiting for my new one before I start cutting, because I'm using the old one as a plug so I can drive until then. My pin measures 1.141". My switch pushes smoothly, against the spring, but I have to bottom it out and press kinda hard to get the contacts to close (measured with an ohmmeter). I'm ordering a new one today. Pelican has them for $72.25. 62 in stock. Jim You should be careful when purchasing a new switch. I bought 2 brand new switches from AA (roughly $80 each) and they both leaked. Bought a used switch from the good Dr. Evil and it didn't leak. Apparently, Porsche had a run of bad switches. Leaky, leaky. Get a good used switch. |
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| astronomerdave |
Apr 19 2009, 01:05 PM
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Member Group: Members Posts: 69 Joined: 26-January 09 From: Los Angeles, CA Member No.: 9,979 Region Association: Southern California |
QUOTE(davesprinkle @ Apr 19 2009, 09:23 AM) You should be careful when purchasing a new switch. I bought 2 brand new switches from AA (roughly $80 each) and they both leaked. Bought a used switch from the good Dr. Evil and it didn't leak. You have to be careful with used switches, too. I found the source of my problem. It turns out that the used switch I got from Dr. Evil is a little bit different from my original one. The contact surface of the new-used switch is located deeper inside, which means that it's just out of the reach of my pin when used with the washer. |
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Posts in this topic
davesprinkle reverse light switch Feb 5 2009, 01:52 PM
GeorgeRud I've never had one go bad on me, so it seems o... Feb 5 2009, 02:13 PM
davesprinkle
I've never had one go bad on me, so it seems ... Feb 6 2009, 12:07 PM ejm Maybe the actuating pin is little too long causing... Feb 6 2009, 05:34 AM Joe Ricard That's what I would guess.
As well as the meta... Feb 6 2009, 06:38 AM Drums66
That's what I would guess.
As well as the met... Feb 6 2009, 03:08 PM Dr Evil Did you ever remove the actuating pin? It may be i... Feb 6 2009, 08:53 AM davesprinkle
Did you ever remove the actuating pin? It may be ... Feb 6 2009, 12:10 PM Dr Evil
Did you ever remove the actuating pin? It may be... Feb 6 2009, 01:31 PM davesprinkle
[quote name='davesprinkle' post='1130912' date='F... Feb 6 2009, 01:35 PM kconway Vent is oposite side of the case top just before t... Feb 6 2009, 12:47 PM Demick I've had the reverse switch leak through the s... Feb 6 2009, 03:49 PM davesprinkle
I've had the reverse switch leak through the ... Feb 6 2009, 06:26 PM ejm
If you remove it make note of where the vent hol... Feb 6 2009, 05:32 PM astronomerdave
Pulled the switch and pin out of a box at the sho... Apr 9 2009, 03:07 AM astronomerdave :bump:
Does anyone know the position of the pin ... Apr 15 2009, 03:43 PM Maltese Falcon I've had 2 new ones go bad, all leaking at the... Feb 7 2009, 04:28 PM davesprinkle
I've had 2 new ones go bad, all leaking at th... Feb 7 2009, 07:40 PM ssstikircr I could just be a bad batch when those were made. ... Feb 7 2009, 05:43 PM kwales Seals,
We don;t need no stinking seals..
Probabl... Feb 7 2009, 05:48 PM Dr Evil Dave, I'll sell you a used one for cheap ;) PM... Feb 7 2009, 08:04 PM charliew I wonder if the same switch is on the type 1 vw tr... Apr 9 2009, 09:19 AM perrin1097
OK, I'm now on my third reverse switch, with ... Apr 19 2009, 10:29 AM charliew Ok when things go to hell after you've been me... Apr 19 2009, 01:07 PM astronomerdave
Ok when things go to hell after you've been m... Apr 19 2009, 01:12 PM charliew I'm talking about the amount of shift movement... Apr 19 2009, 01:22 PM Cap'n Krusty
I'm talking about the amount of shift movemen... May 3 2009, 07:38 PM jk76.914 Well I installed my new switch from Pelican last w... May 3 2009, 05:16 PM astronomerdave
I was wondering why my original switch failed, so... May 4 2009, 08:35 AM Dr Evil Thats just plain cool! Well done :) May 3 2009, 06:20 PM davesprinkle Good work on this investigation, jk.
I'm surp... May 3 2009, 06:46 PM jk76.914 The rubber diaphram is in the 33 year old switch. ... May 3 2009, 07:01 PM charliew Why not just put the tranny in reverse with the sw... May 3 2009, 07:25 PM jk76.914
Why not just put the tranny in reverse with the s... May 3 2009, 08:33 PM charliew You are correct in what you post about the more re... May 4 2009, 09:22 AM |
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