Idiot light flashing

[Doug Yoder]

Duncan Thomson wrote:

>Anyways, got it back together and running, and I have an issue with the 
>idiot light (!) flashing at me. It seems to be intermittent, but no 
>other lights come on to give me a clue as to what is causing it. Is it 
>likely to be a blown bulb preventing me seeing *another* warning light, 
>or are there circumstances when the (!) light will come on by itself? 
>Should it be flashing, or is because the fault is intermittent?
>
>As a bit of background, the head was off, and all vacuum and breather 
>lines are likely to be completely shuffled at this stage, but managed to 
>get close enough for an idle!
>Have to hunt out a schematic in the family album and see what I'm missing.
>  
>
The (!) light is for brakes... does your 90 have a vacuum-powered brake 
booster?  Is the vacuum line disconnected?

Just a thought,
-Doug