Electronics Need help wiring something up? Thinking of adding an electrical component to your car? Need help troubleshooting that wiring glitch?

Speedo reads incorrectly, back lights not coming on in the cluster

Thread Tools
 
Search this Thread
 
Old Jul 24, 2025 | 10:59 PM
  #1  
ristaix's Avatar
Thread Starter
Junior Member
 
Joined: Jul 2025
Posts: 1
Likes: 0
Speedo reads incorrectly, back lights not coming on in the cluster

Hey I’m getting to drive my dads Camaro for a while and I got a couple issues I want to address when I can.

its a 305 TPI iroc-z (1990) and it has a 3.73 rear end if I remember right and I need a speed sensor that’ll read it properly

and any guesses as to what could cause the back light being out
Reply
Old Jul 25, 2025 | 06:34 AM
  #2  
T.L.'s Avatar
Supreme Member
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 1999
Posts: 3,016
Likes: 818
From: Colorado USA
Car: '83 Firebird (T/A Clone)
Engine: 350 with L-69 components
Transmission: 700R-4, 2000 RPM stall converter
Axle/Gears: 10-bolt/3.73 ..
Re: Speedo reads incorrectly, back lights not coming on in the cluster

The light bulbs (194) are probably burnt out after 35 years...
Reply
Old Jul 25, 2025 | 09:46 PM
  #3  
jmd's Avatar
jmd
Supreme Member
25 Year Member
Liked
Loved
Community Favorite
iTrader: (4)
 
Joined: Jul 2000
Posts: 6,522
Likes: 92
From: Aridzona
Car: `86 SS / `87 SS
Engine: L69 w/ TPI on top / 305 4bbl
Transmission: `95 T56 \ `88 200-4R
Re: Speedo reads incorrectly, back lights not coming on in the cluster

The speedo gear on the VSS and the drive gear on the output shaft have tooth counts of 44 or 45 and 15 on the automatic models with stock third gen tire sizes and 3.73 gears. Pop the VSS out and start counting.
Reply
Old Jul 25, 2025 | 10:27 PM
  #4  
Tuned Performance's Avatar
Sponsor
20 Year Member
Community Builder
Community Influencer
Community Favorite
iTrader: (94)
 
Joined: Dec 2004
Posts: 16,774
Likes: 1,002
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Speedo reads incorrectly, back lights not coming on in the cluster

With the lack of Vss gears available, it would be easier to wire is a Dakota digital sgi-100bt
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Emac88
Electronics
2
Apr 6, 2015 08:51 AM
Jaswir
Body
3
Nov 16, 2004 10:44 AM
samdog1232000
Body
4
Jul 3, 2003 11:00 PM




All times are GMT -5. The time now is 10:14 AM.