I have a 1989 FC rx7 and after I replaced the main 100apm fuse after I start the car after a couple of seconds is starts beeping.
it is one constant beep and kinda sounds the same as the rev limiter,
anyone know whats wrong?

 

Likely the low coolant warning buzzer. First, check the coolant level and ensure its full. Next, inspect the coolant level sensor on the top of the radiator. Ensure the wire is connected and also that its not broken. We can go from there if the issue still persists.

 

thanks for the help I will let you know how it goes

 

turns out it was a broken coolant sensor.
thanks for the help

 

Glad you were able to get it diagnosed and fixed quickly and easily!