1987 rx7 gx no mods.
After washing my car, i went to start it and the warning light started to blink rapidly.
It sound like a relay is being on and off over and over. I have found out it is coming from the CPU, next to the fuse panel beside the pedals. Is there a way to check this unit or the plugs that goes to it?
Any help would be nice.
Heres a video:

 

my guess?
I think you got water on something..maybe the alternator connection?
If all the Lights come on the Idiot cluster then that is a sign that your alternator is failing.

 

rev pass 2000 rpm and the lights go away and stops ticking.

 

ah.Hmm..Idea..
check the belt tension on your alternator.
If water got on it,then it may be slipping the belt.

 

i tighten up the belt, ran it check with multimeter, 12.6v, think the alternator dead , i rev it, no change in voltage.
i was wondering, would the voltage increase slightly when you rev it even when it kaput?

 

key in on position, i check the 2 wire plug that goes behind the alternator, the R terminal side of the plug got bit over 12V and the L terminal side of the plug got 11. something V, is it ok?

 

The alternator will self excite when reved over a certain amount so that is why it can produce voltage at higher rpms. The B/W wire has 12 volts w/key to on and the other wire, White/Black, would have close to zero volts w/key to on if the wire/plug was connected to the alternator or 12 volts while unplugged.

 

i have rev it pass 4k and no change

 

replace the alternator and now it wonderful, cant believe i didn't check/see that the alternator wasn't charging :P didn't notice that the battery gauge was sitting at 12V and not at around 14V. lol
thx