Anyone able to help speedometer cluster
Thread Starter
Heel & Toe
Joined: May 2010
Posts: 18
Likes: 0
Anyone able to help speedometer cluster
Ok here is what i know about the car
recently purchased
1979 corvette 350 4bl
replacement engine
auto transmission
not sure what other info might be needed but heres the problem
my speedometer does nothing. my odometer doesnt work.
my tachometer reads 7k rpm and never moves just stays all the way over to the right even when vehicle is off
recently purchased
1979 corvette 350 4bl
replacement engine
auto transmission
not sure what other info might be needed but heres the problem
my speedometer does nothing. my odometer doesnt work.
my tachometer reads 7k rpm and never moves just stays all the way over to the right even when vehicle is off
Safety Car
Joined: Mar 2007
Posts: 3,652
Likes: 49
From: Bridgewater nj
Speedo and tach are two different animals. The speedo is mechanical, you most likely have a broken speedo cable. The tach someone else will chime in. I never had a problem with mine but I do know they sell curcuit boards and rebuild them.
Thread Starter
Heel & Toe
Joined: May 2010
Posts: 18
Likes: 0
Today i followed the the speedo cables and they are all intact and connected.
Drifting
Joined: Oct 2007
Posts: 1,317
Likes: 22
From: Marina CA
Does your car have 2 cables one from the dash to a transducer for the cruise control and then another cable from the transducer to the transmission? If so the transducer has probably gone bad. Also you need to look at the cable itself inside the cable housing just because they're connected doesn't mean the cables are good.
Go to the Willcox website, they probably have a troubleshooting printout for the tach.
Go to the Willcox website, they probably have a troubleshooting printout for the tach.
Thread Starter
Heel & Toe
Joined: May 2010
Posts: 18
Likes: 0
Does your car have 2 cables one from the dash to a transducer for the cruise control and then another cable from the transducer to the transmission? If so the transducer has probably gone bad. Also you need to look at the cable itself inside the cable housing just because they're connected doesn't mean the cables are good.
Go to the Willcox website, they probably have a troubleshooting printout for the tach.
Go to the Willcox website, they probably have a troubleshooting printout for the tach.
Thread Starter
Heel & Toe
Joined: May 2010
Posts: 18
Likes: 0
ok so new update i removed the speedo cable from the tranny and turned it there and the speedo moves but connected i still have nothing and ideas?
Le Mans Master
Joined: Oct 2005
Posts: 6,247
Likes: 471
From: Glen Allen, VA
If the speedo works when the cable is disconnected from the trans and spun, then something is wrong with the speedo gears inside the trans. My 79 is a 4 spd, and there is a small nut that holds a small cover over the speedo gears. Just take that nut off and you'll get to the gears, and then I would check them out for damage. I assume an auto is similar, but don't know.
Thread Starter
Heel & Toe
Joined: May 2010
Posts: 18
Likes: 0
If the speedo works when the cable is disconnected from the trans and spun, then something is wrong with the speedo gears inside the trans. My 79 is a 4 spd, and there is a small nut that holds a small cover over the speedo gears. Just take that nut off and you'll get to the gears, and then I would check them out for damage. I assume an auto is similar, but don't know.
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