Gauge malfunction alongside heater quit working.

[P3loves77]

So, something weird has been happening with my truck off and on randomly. While driving, my speedometer, temp gauge, and heater/ac, stop working completely along with my battery light pops and stays on for the entire duration that the rest isn’t working. Then at random times, they’ll all come back on working as usual as if nothing was wrong in the first place. I’ve replaced the alternator, battery, and the crankshaft position sensor and it started doing it again today. Does anyone by chance know what the cause of this happening is??

 

[zora]

Have you used a multimeter to test alternator output when the light is on?

 

[P3loves77]

No I haven’t but it’s a brand new alternator and battery. It’s still doing everything I mentioned previously. It’s weird normally it quits and goes back to normal within a day or two and it’s been a week.

 

[zora]

Anything new can also be defective along with bad cables or wiring harness.