a week or two ago my expy (99' EB 5.4L) developed a fast
blinker turning right (left is fine).

with other cars, this generally meant the bulb was on it's way
out..

anything else to check for? I'll probably swap the bulb later
this week.

-d

 

"On it's way..."?
How could it do that, isn't a bulb is Pass/Fail?

You'll probably find a bulb out already.
The fast blink doesn't tell you which bulb, just which side.

 

Often the flasher itself is FUBAR.

 

A fast flash is usually a bulb due to impendence changes in the circuit.