My 1987 GLHS - Turbo Dodge Forums : Turbo Dodge Forum for Turbo Mopars, Shelbys, Dodge Daytona, Dodge SRT-4, Chrysler PT Cruiser, Omni and more!

Electrical Help and Discussion area for any Electrical issues/diagrams.

 
LinkBack Thread Tools
post #1 of 6 Old 08-28-2018, 11:05 AM Thread Starter
TD New Guy
 
Join Date: Aug 2018
 
1/4: 0.000

Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
 
Arrow My 1987 GLHS

Having issues with instrument panel when using rheostat on headlamp switch. When the instrument panel lights are turned up all the gauges including the tach go to maximum setting and buzzing occurs. When using without the headlights on the turn signals will cause a slight bounce in the gauges also. Headlamp switch has been replaced, new turn signal switch was tested, all grounds have been tested and an additional ground wire was installed without solving any issues. The thought is that the ECM is the problem however since it is not returnable changing it would mean additional expense which still may not solve the issue.
Thoughts or experiences with this issue?

Last edited by wyghostown; 08-28-2018 at 11:08 AM. Reason: grammar
wyghostown is offline  
Sponsored Links
Advertisement
 
post #2 of 6 Old 08-28-2018, 12:50 PM
Garrett Booster
 
Join Date: Sep 2006
Location: Oregon
 
Induct: Turbo + Nitrous
1/4: 0.000

Posts: 188
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: My 1987 GLHS

Have you replaced bulbs in the cluster recently?
Recheck the bulbs in there respective sockets, make sure the bulbs all connect to the correct surface pad, another issue could the the small voltage regulator, verify proper voltage.
Can you determine where the buzzing is coming from?
That would be a good place to try to narrow the focus of your concern (@ buzzing noise).



Sent from my iPhone using Tapatalk
2fast2dodge is offline  
post #3 of 6 Old 08-29-2018, 08:07 AM
NAJ
Just A Guy


 
NAJ's Avatar
 
Join Date: Mar 2007
Location: New Jersey
 
My Ride: 1990 Daytona Shelby
Engine: 2.2 L VNT
Induct: Turbo
1/4: 15.570

Posts: 23,884
Thanks: 0
Thanked 1 Time in 1 Post
       
Re: My 1987 GLHS

Welcome To TD!!!

I have heard of other people having similar issues and it turned out to be a faulty headlamp switch.

Mopar #4221398
Mopar Parts | Order OEM Mopar Parts for All Dodge, Chrysler and Jeep Cars or Trucks 24/7
Old Part Number 4221398
New Part Number 56021898AC
Part Name SWITCH HEADLAMP
MSRP $80.00
Core $0.00
Online Price $57.60

https://www.rockauto.com/en/moreinfo...=43568&jsn=252
NAJ is offline  
Sponsored Links
Advertisement
 
post #4 of 6 Old 08-29-2018, 09:41 AM Thread Starter
TD New Guy
 
Join Date: Aug 2018
 
1/4: 0.000

Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: My 1987 GLHS

Headlamp switch has been tested with two different ones. As far as the brand neither were from Mopar. In both cases it made no difference.
wyghostown is offline  
post #5 of 6 Old 08-29-2018, 10:17 AM Thread Starter
TD New Guy
 
Join Date: Aug 2018
 
1/4: 0.000

Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: My 1987 GLHS

No bulbs were replaced, voltage regulator was tested, buz or hum cause not yet determined
wyghostown is offline  
post #6 of 6 Old 08-29-2018, 11:56 AM
NAJ
Just A Guy


 
NAJ's Avatar
 
Join Date: Mar 2007
Location: New Jersey
 
My Ride: 1990 Daytona Shelby
Engine: 2.2 L VNT
Induct: Turbo
1/4: 15.570

Posts: 23,884
Thanks: 0
Thanked 1 Time in 1 Post
       
Re: My 1987 GLHS

Electrical "hums" are caused by electromagnetic fields causing a vibration in itself or another electrical component that is nearby.

My first thought would be a ground issue but you have stated they were tested.
I assume all cluster/dash grounds were verified to have less than 5 ohms resistance to the - battery?

If the grounds prove to be OK you will need to remove the cluster components/gauge clusters one at a time until you eliminate the noise then you can check that circuit/gauge for electrical issues.
Remove each one at a time
NAJ is offline  
Sponsored Links
Advertisement
 
Reply

Tags
electrical problem , instrument panel

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Turbo Dodge Forums : Turbo Dodge Forum for Turbo Mopars, Shelbys, Dodge Daytona, Dodge SRT-4, Chrysler PT Cruiser, Omni and more! forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Member names may only be composed of alpha-numeric characters. (A-Z and 0-9)

!!ATTENTION ADVERTISERS!! If you intend on advertising anything on this forum, whatsoever, you are required to first contact us here . Additionaly, we do NOT allow BUSINESS NAMES unless you are an Authorized Vendor. If you own a business, and want to do sales on this site via posting or private message, you will need to follow the rules. Shops, Stores, Distributors, Group Buys without being authorized will see your account terminated.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome