Speedometer

Changed the battery and alternator. Truck was dying and had a whining noise. Noise went away but the speedometer is all off. Could it be a fuse or is this something a mechanic need to deal with

 

Just the Speedometer or the entire Combination Meter Assembly? Try and be real specific about what isn't working? The illumination or the gauges or the speedometer...

Need more information.

Do you have anything else without power?
If so post up what else is effected.

Do you have any warning lights such as Check Engine Light?
If so read the codes and post back.

Check the IG1 Fuse 10 Amp that supplies the Speed Sensor, the Gauge Fuse 7.5 Amp and the ECU-B 7.5 Amp Fuse. I feel pretty sure you would have all kinds of issues if it were a fuse.

IG1 Loads:
ABS (w/ VSC), TRAC, VSC, Auto LSD, Downhill Assist Control and Hill–Start Assist Control, ABS (w/o VSC), Accessory Meter, Air Conditioning, Back–Up Light, Charging, Combination Meter, Cruise Control (1GR–FE), Cruise Control (2TR–FE), Electronically Controlled Transmission and A/T Indicator (1GR–FE), Electronically Controlled Transmission and A/T Indicator (2TR–FE), Engine Control (1GR–FE), Engine Control (2TR–FE), Headlight, Multi Mode 4WD, and Rear Differential Lock, Power Outlet (115V), Rear Differential Lock (2WD), Seat Belt Warning, Shift Lock, SRS, Tire Pressure Warning System, Trailer Towing, Turn Signal and Hazard Warning Light.

Gauge Fuse Loads:
ABS (w/ VSC), TRAC, VSC, Auto LSD, Downhill Assist Control and Hill–Start Assist Control ABS (w/o VSC), Accessory Meter, Air Conditioning, Charging, Combination Meter, Cruise Control (1GR–FE), Cruise Control (2TR–FE), Electronically Controlled Transmission and A/T Indicator (1GR–FE), Electronically Controlled Transmission and A/T Indicator (2TR–FE), Engine Control (1GR–FE), Engine Control (2TR–FE), Key Reminder, Multi Mode 4WD and Rear Differential Lock Power Outlet (115V), Rear Differential Lock (2WD), Seat Belt Warning SRS, Tire Pressure Warning System.

ECU-B Fuse Loads:
ABS (w/ VSC), TRAC, VSC, Auto LSD, Downhill Assist Control and Hill–Start Assist Control, Accessory Meter, Air Conditioning, Combination Meter, Cruise Control (1GR–FE), Cruise Control (2TR–FE), Door Lock Control, Electronically Controlled Transmission and A/T Indicator (1GR–FE), Electronically Controlled Transmission and A/T Indicator (2TR–FE), Engine Control (1GR–FE), Engine Control (2TR–FE), Engine Immobiliser System (1GR–FE), Engine Immobiliser System (2TR–FE), Headlight Interior Light Key Reminder, Light Auto Turn Off System, Multi Mode 4WD and Rear Differential Lock, Power Outlet (115V), Power Window, Rear Differential Lock (2WD), SRS, Tire Pressure Warning System, Wireless Door Lock Control.