Stuck speedometer
Thread Starter
4th Gear
Joined: Apr 2002
Posts: 4
Likes: 0
Stuck speedometer
My speedometer gets stuck on zero until I get rolling about 20 -25 miles per hour. Then it unsticks, and it works just fine. This only happens when the car has not been driven for a few days. Is there a quick and easy fix for this I can do myself?
Aston.
Aston.
Addicted Specialist
Rennlist Member
Rennlist Member
Joined: Jun 2001
Posts: 6,242
Likes: 438
From: So.CA
Aston,
I can't speak for the porsche, but this has happened to me in the past in a non P-car. It's the guts of the speedo...not much you can do but live with it or get it fixed. I've had work done on both a tach and speedo at "North Hollywood Speeometer." They've been around for a long time and they do great work. I seem to recall "PaloAlto Speedo" as well in Pano, though I don't know anything about them. hope this helps.
Edward
I can't speak for the porsche, but this has happened to me in the past in a non P-car. It's the guts of the speedo...not much you can do but live with it or get it fixed. I've had work done on both a tach and speedo at "North Hollywood Speeometer." They've been around for a long time and they do great work. I seem to recall "PaloAlto Speedo" as well in Pano, though I don't know anything about them. hope this helps.
Edward
Burning Brakes
Joined: May 2001
Posts: 967
Likes: 1
I could also be the speedo cable. In one of my previous cars, the speedo would stick at any random speed for a while, then unstick and jump to whatever new speed I was driving at. I was able to disconnect the cable from the back of the speedo, and shoot some lube down it. Gravity carried the lube down the length of the cable. I think I used a Teflon type spray. I think there are specific lubes for speedo cables. This lube solved the problem.
Rennlist
Lifetime Member
Lifetime Member
Joined: May 2001
Posts: 3,651
Likes: 8
From: Chino hills, CA
To my understanding the 993's speedometer is a electrical based system. (Not mechanical cable driven)
The DME get's the pulse signal from the rear left wheel speed sonsor which provides the data in conjunction with the ABS system.
Most likily your problem is associated with the speedometer needle itself.
I would "borrow" someone else's speedometer for testing purpose and determine if that's the culpit.
(Obviously I don't think it is the speed sensors that's causing the problem, or else you would be posting an ABS question instead.)
The DME get's the pulse signal from the rear left wheel speed sonsor which provides the data in conjunction with the ABS system.
Most likily your problem is associated with the speedometer needle itself.
I would "borrow" someone else's speedometer for testing purpose and determine if that's the culpit.
(Obviously I don't think it is the speed sensors that's causing the problem, or else you would be posting an ABS question instead.)
Instructor
Joined: Mar 2002
Posts: 128
Likes: 0
Does anyone have the wiring diagram for the speedo plug on a 96 993? That is, the plug that connects to the back of the speedo. I am trying to find out what each wire does based on its color association. Anyone have any idea of what the various color wires do? Thanks.
Rennlist
Lifetime Member
Lifetime Member
Joined: May 2001
Posts: 3,651
Likes: 8
From: Chino hills, CA
[quote]Originally posted by C4S:
<strong>Does anyone have the wiring diagram for the speedo plug on a 96 993? That is, the plug that connects to the back of the speedo. I am trying to find out what each wire does based on its color association. Anyone have any idea of what the various color wires do? Thanks.</strong><hr></blockquote>
Can't explain it, I tried.... Had to erase the whole post because it didn't make sense. You really have to look at the schematic in order to under stand it. Unfortunately you need the complete schematics, because it will take you through different pages.
<strong>Does anyone have the wiring diagram for the speedo plug on a 96 993? That is, the plug that connects to the back of the speedo. I am trying to find out what each wire does based on its color association. Anyone have any idea of what the various color wires do? Thanks.</strong><hr></blockquote>
Can't explain it, I tried.... Had to erase the whole post because it didn't make sense. You really have to look at the schematic in order to under stand it. Unfortunately you need the complete schematics, because it will take you through different pages.
Trending Topics
AutoX
Joined: May 2001
Posts: 13
Likes: 0
From: Laguna Niguel, CA
I had this identical problem about nine months ago.
Apparently, the lubricants inside of the speedometer can break down and cause the needle to "stick". Having the speedometer head removed and internally cleaned and re-lubricated (cost approximately $45) solved the problem.
As mentioned earlier, the speedometer (96 993) is electrical and can be easily removed (four wire connectors) from the instrument panel. There is no mechanical cable.
Hope this helps,
Charles Morrison
Apparently, the lubricants inside of the speedometer can break down and cause the needle to "stick". Having the speedometer head removed and internally cleaned and re-lubricated (cost approximately $45) solved the problem.
As mentioned earlier, the speedometer (96 993) is electrical and can be easily removed (four wire connectors) from the instrument panel. There is no mechanical cable.
Hope this helps,
Charles Morrison
Rennlist Stories
The Best Porsche Posts for Porsche Enthusiasts
Porsche 911 GT3 Artisan Edition Pays Homage to Japanese Culture
Verdad Gallardo
Porsche Reveals Coupe Variant of the Electric Cayenne With a Fresh Look
Verdad Gallardo
10 Porsche Colors That Have More Personality Than Most People
Verdad Gallardo
Guntherwerks' Final Speedster Creation Is the Ultimate Porsche Restomod
Verdad Gallardo
10 Reasons I Hate Going to the Porsche Dealership (& the 1 Reason I Stay)
Joe Kucinski
Porsche Shakes Up The Nürburgring Lap Record Table Once Again
Verdad Gallardo
6 Ways the Porsche 911 GT3 S/C Redefines Performance
Joe Kucinski
10 Wildest Homologation Specials Porsche Ever Sold
Verdad Gallardo
Super Rare RUF BTR III Comes Out of Hibernation, Looking For a New Home
Verdad Gallardo
AutoX
Joined: Jan 2002
Posts: 10
Likes: 0
From: Michigan USA / Leicestershire UK
[quote]Originally posted by C4S:
<strong>Does anyone have the wiring diagram for the speedo plug on a 96 993? That is, the plug that connects to the back of the speedo. I am trying to find out what each wire does based on its color association. Anyone have any idea of what the various color wires do? Thanks.</strong><hr></blockquote>
<strong>Does anyone have the wiring diagram for the speedo plug on a 96 993? That is, the plug that connects to the back of the speedo. I am trying to find out what each wire does based on its color association. Anyone have any idea of what the various color wires do? Thanks.</strong><hr></blockquote>
AutoX
Joined: Jan 2002
Posts: 10
Likes: 0
From: Michigan USA / Leicestershire UK
[quote]Originally posted by C4S:
<strong>Does anyone have the wiring diagram for the speedo plug on a 96 993? That is, the plug that connects to the back of the speedo. I am trying to find out what each wire does based on its color association. Anyone have any idea of what the various color wires do? Thanks.</strong><hr></blockquote>
Did you ever find out this information - I'm looking for the same.
<strong>Does anyone have the wiring diagram for the speedo plug on a 96 993? That is, the plug that connects to the back of the speedo. I am trying to find out what each wire does based on its color association. Anyone have any idea of what the various color wires do? Thanks.</strong><hr></blockquote>
Did you ever find out this information - I'm looking for the same.
Instructor
Joined: Mar 2002
Posts: 128
Likes: 0
I figured out the wiring for the back of the speedometer on a 993. Should you need the info, please email me and I will send it to you. I don't have pics, just what each wire does based on its color association. Thanks. <img src="graemlins/beerchug.gif" border="0" alt="[cheers]" />
E
eisban@yahoo.com
E
eisban@yahoo.com
