On early Honda's, it is common for the cooling fan temperature switch to become defective. One way to check this is to turn on the A/C system, if you have A/C. If the fan comes on with the A/C, then the fan motor and relay are ok. If not, then the there is a problem with the motor, relay or fuse. If they do come on, then check the cooling fan temp switch. You can test it by using a fused jumper wire to bypass the switch to see if the fan comes on.