Abs, brake light, ac blower not blowing

Maintenance/Repairs
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1

2008 isuzu, ascender with a 175,000+ miles. runs smooth. At startup the other day the abs light came on and brake came on at the same time the air conditioner stopped blowing inside. You can hear and feel the compressor running.

Brake fluid is at the correct level.

Battery is only 2 years old and is holding charge just under 13v and alternator charges at 14v.

no error codes.

The air conditioner blower motor does not blow. I checked all fuses and they are all good, checked all relays and they are all tested good. Both the under seat and in the engine bay fuse boxes. Changed the blower motor resistor for a new one and confirmed blower motor works when hooked directly to a battery.

Occasionally, the temperature gauge does not work, but the car cooling system is flowing and operational. When temp gauge does not work error P0128 comes up and is easily cleared, which will reset the temperature gauge.

What else might I be missing?

2

Tester

1 Like
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Also check for loose or corrosion at the battery cable ends and grounds…

You can even use jumper cables and hook one end to the negative battery terminal and the other to metal on the engine block or head to see if it helps as well as from the battery negative terminal to the chassis, and from the engine to the chassis, that will show you if you have a ground corroded up or bad connection you can’t see…

Obviously you can not clamp to a painted surface etc…

Just be careful around any moving parts…

4

Fuse # 39 powers the steering angle position sensor and the HVAC control panel.

In the rear seat fuse box, measure the voltage at fuse # 39 10 amp (HVAC1) and # 44 30 amp (HVAC). Both fuse circuits are powered by the ignition switch.

That fault should clear after the cooling system thermostat is replaced.