engine shuts off
 

Have a 2000 Camry that if you turn on the blower motor to get heat the engine dies like turning off the ignition. I checked grounds and replaced the blower switch and cannot find the problem. once the engine stops or with car not running th blower fan works fine. Just cant turn on the blower fan while driving down road or the car stalls like turning off the ignition. Car will not start if blower fan is engaged. Any help is much appreciated.

Has anyone modified the cars wiring, installed a remote, alarm, etc?

Automatic or manual climate system.

Is the A/C off when this happens, as in only using the heater?

How is the battery and alternator output?