1990 240sx : Check Engine light question

[THE-D]

ok so this morning when i went to turn on my car nothing happened, then i noticed nothing was on radio or lights, so i pop up the hood and wiggle the connectors to the battery, everything turns on inside and it starts up fine

then after i leave from where i went the check engine light when on but after i hit a bump it went off

i was wondering if its cause the connection was loose?

[MaximA32]

I would suspect that it is a loosr connection somewhere. Check all the o2 sensors and anything that could cause an immediate fault in the system. Pretty much anything emissions related would do it.

[THE-D]

alright, thanks for the advice