92 K5 TJ

hI ALL, NEWBIE HERE
Wondering if anyone has encountered these problems?

Truck is idling and when I tap gas peddle the Speedo goes to 90 MPH
Speedo takes off while in Drive as well.

2) Idling, Accumulated Mileage on Gauges increases, same with odometer
These are regular Analog Gauges not digital.

3) Dash at night goes very dull and amp gauge goes down to 9 amps when stopped IDLING.
Then Accelerate, back on the gas the gauge reads 12- 14 Amps and dash Lights up fully.

4) Turn on Fan for Heat and problem goes away. SPEEDO WORKS.


Symptoms: 1) Drained Battery to 11.2.
ACTION: Removed termonals, cleaned and charged battery - Re-Installed Battery.

2) Load Test Alternator and reads 9.8 Amps.

Turns out ?? Regulator in Alternator was Fried.
ACTION: Replaced Alternator, with same manufacturer / type.

This type, "I AM TOLD" only cuts in OR CHARGES when Battery is down.

Recharged Battery and so far no issues with battery. sTILL TROUBLE WITH THE TRUCK gauges.


I am thinkin could this be a cheaper alternator?
Had no issues with oversized alternator for last 3 years, so is new 105 Amp, Lower Voltage Alternator causing all of this?

Or am I dealin with electrical short/s somewhere ie: in the dash?
Read all other related posts and saw something about replacing a Ground and Speedo VSS ?

Any thoughts? Recomendations?

Tom

kevinkpk

Did you add any larger than standard electrical load as in stereo/lights? The larger amp output won't effect anything lower than the load, i.e. 105 amp alternator with a 60 amp load, or 105 amp with 105 amp load. ALL alternators will charge all the time rather it be 13.5 volts at 1 amp or 13.5 volts at 105 amps (i.e).
Looks to me as if you have a wiring issue.