I have a 1990 RS 305 TBI and having a problem with the ses light...this is what the problem is,when I turn the key on "engine off" the ses light will come on for about 1 sec and then it turns off and it doesnt come back on... I replaced the ecu two times within a month,and the ses light will work properly for a little longer than a week...the reason its such a problem is trying to retrieve codes...If I try to read any codes jumping a b on the adl connection,the ses light wil not"give any codes".... But when the ses light is working properly iam able to retrieve codes with no problem..

 

anybody out there that can help me????