Honda driver blinker too fast

This seems to be farily common problem. I replaced the bulb but it burnt
out very quickly(minutes).

Does anyone know how the blinker system works on the 90 Civic DX?
Where is the blinker relay?

Thanks

 

The 90 Civic use either of the two.

1) On an IC controlled flasher, lamp outage sensing is designed to sense whether
there is adequate current being demanded by the combined light bulb loads,
and, if not, the flasher will increase the flash frequency by a typical ratio
of 2:1. The method of sensing the above described "low load" condition
involves a current sensing circuit which monitors the voltage drop across a
very low ohmic value resistor.

2) Most early Hondas use internal reference voltage which is compared against the
voltage drop across the sense resistor, and the result of that comparison
determines if the oscillator will run at "normal" rate or at "double rate"
for bulb outage detection.

In plain English, 1-bulb = fast blinks. 2 or more = normal blinks.

Is your car > 14.4-volts?

Follow clickings on dash fuse box.

 

It works now. Maybe poor grounding.
Where is the sensing resistor or IC?

Thanks

 

Inside the flasher relay.