Why no power thru heater fuse

Asked by Derek Dec 28, 2022 at 04:06 PM about the 2000 Toyota Celica GT

Question type: Maintenance & Repair

Troubleshooting blower motor not working checked fuses and relays also tested
blower motor it's good went back to fuses with test light heater fuse doesn't light
up,so I take the fuse out and test the contacts and it lights up? Confused.

3 Answers


Only one side should light the light, if both sides light up then you have a power feed back in the heater blower circuit and it time to dig out the wiring diagrams and start testing circuits. Now if only one contact lights the light then ohm out the fuse, wouldn’t be the first time a fuse looked good but was totally open.


Did you check for juice getting to the heater fuse; might be a burned wire? That's a pretty old car and anything can happen.

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