Tachometer and speedometer quit working and loss of power?

1994 OLDSMOBILE SILHOUETTE
180,000 MILES
Avatar
KCMOREHOUSE
  • MEMBER
  • 1 POST
Starts up fine, but no power. Also, the blower motor will work with acc on but when you start the engine no more blower.
Feb 28, 2023 at 10:03 AM
Advertisement
Avatar
JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 POSTS
Hi,

Did the blower motor issue start at the same time as the speedo and tach issue? Let me know that. Also, I need you to scan the computer to determine if there are any useful diagnostic trouble codes.

This vehicle has an OBD1 system that doesn't require a scan tool for retrieving codes. All you need is a short jumper wire or even a paper clip will work.

Follow the directions in this link and let me know what you find:

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

Let me know if there are any other electrical concerns.

Take care,

Joe
Feb 28, 2023 at 8:30 PM