Blazer Forum - Chevy Blazer Forums

Lighting & Electrical Post your lighting and chassis/engine electrical questions here. Any audio/video questions should be posted in the 'Audio/Video Electronics' section.

Gauges and radio frustration

Thread Tools
 
Search this Thread
 
  #1  
Old 01-06-2018, 12:22 PM
JMichael17's Avatar
Starting Member
Thread Starter
Join Date: Jan 2018
Posts: 8
JMichael17 is on a distinguished road
Default Gauges and radio frustration
Every once in a while my gauges and radio will stop working while the car is on I’m trying to figure out why.
01 blazer 4 door 4wd lt
 
Reply
  #2  
Old 01-06-2018, 12:51 PM
christine_208's Avatar
BF Veteran
Join Date: Dec 2016
Location: Moscow, ID
Posts: 4,877
christine_208 will become famous soon enoughchristine_208 will become famous soon enough
Default
I once had my gauges and radio go out (along with the HVAC) when the radio shorted out blowing a fuse. Maybe there is an intermittent open circuit in that circuit or at the supply voltage for that circuit that serves all those components?
 
Reply
  #3  
Old 01-06-2018, 01:03 PM
Rusty Nuts's Avatar
Senior Member
Join Date: Mar 2015
Location: waterford, mich.
Posts: 811
Rusty Nuts is on a distinguished road
Default
Welcome to the forum. Is the stereo stock? If it's aftermarket the first thing I check is the previous installer's wiring. Do all the gauges drop out or just the speedometer?
 
Reply
  #4  
Old 01-06-2018, 01:04 PM
JMichael17's Avatar
Starting Member
Thread Starter
Join Date: Jan 2018
Posts: 8
JMichael17 is on a distinguished road
Default
Originally Posted by christine_208
I once had my gauges and radio go out (along with the HVAC) when the radio shorted out blowing a fuse. Maybe there is an intermittent open circuit in that circuit or at the supply voltage for that circuit that serves all those components?
All I know is that a swift hit to the dash turns everything back on. I’m thinking a loose ground wire?
 
Reply
  #5  
Old 01-06-2018, 01:16 PM
JMichael17's Avatar
Starting Member
Thread Starter
Join Date: Jan 2018
Posts: 8
JMichael17 is on a distinguished road
Default
Originally Posted by Rusty Nuts
Welcome to the forum. Is the stereo stock? If it's aftermarket the first thing I check is the previous installer's wiring. Do all the gauges drop out or just the speedometer?
The radio is aftermarket. I put it in. all the connections were soldered. All my gauges lose power and the gear selector lights turn off but my airbag light that is originally on stays on
 
Reply
  #6  
Old 01-06-2018, 01:27 PM
Rusty Nuts's Avatar
Senior Member
Join Date: Mar 2015
Location: waterford, mich.
Posts: 811
Rusty Nuts is on a distinguished road
Default
The factory stereo had SCV (speed compensated volume) most aftermarket models don't. If that wire is not capped off it grounds out and makes the speedometer drop out until the dash gets smacked. Sounds like you're on the right track investigating grounds.
 
Reply
  #7  
Old 01-06-2018, 01:29 PM
JMichael17's Avatar
Starting Member
Thread Starter
Join Date: Jan 2018
Posts: 8
JMichael17 is on a distinguished road
Default
Originally Posted by Rusty Nuts
The factory stereo had SCV (speed compensated volume) most aftermarket models don't. If that wire is not capped off it grounds out and makes the speedometer drop out until the dash gets smacked. Sounds like you're on the right track investigating grounds.
Ok would you happen to know which wire that would be in the harness because when I installed the radio I didn’t chop the stock radio harness up I got a stock to aftermarket adapter. And would the scv wire grounding out cause me to lose all my gauges or just the speedometer ?
 
Reply
  #8  
Old 01-06-2018, 01:32 PM
Rusty Nuts's Avatar
Senior Member
Join Date: Mar 2015
Location: waterford, mich.
Posts: 811
Rusty Nuts is on a distinguished road
Default
The times I've seen it only took out the speedo. Was there a problem with the instrument cluster before the stereo upgrade?
 
Reply
  #9  
Old 01-06-2018, 01:35 PM
JMichael17's Avatar
Starting Member
Thread Starter
Join Date: Jan 2018
Posts: 8
JMichael17 is on a distinguished road
Default
Originally Posted by Rusty Nuts
The times I've seen it only took out the speedo. Was there a problem with the instrument cluster before the stereo upgrade?
I’m am not entirely sure. I had to replace the stock radio because who ever had it before me spilled something down the dash and all the buttons on the stock radio were stuck
 
Reply
  #10  
Old 01-06-2018, 01:36 PM
Rusty Nuts's Avatar
Senior Member
Join Date: Mar 2015
Location: waterford, mich.
Posts: 811
Rusty Nuts is on a distinguished road
Default
When I quote my 2000 factory service manual for wiring on a different year I'm proven wrong. I'd search 01 specifically.
 
Reply



Advanced Search
Quick Reply: Gauges and radio frustration


Reply Closed Thread Share

All times are GMT -5. The time now is 06:22 PM.