LIGHT ON DASH

[DDD106G]

Hi all ive just brought a 69 microbus and can any body help with the following on the dash is a small red button which lights up red when you press it is this a test button also how much movement should there be in the sterring box left to right reckon ive got about 2inch 50mm scary cheers ian

 

[AGC]

Test button for brakes

 

[DDD106G]

Test button for brakes

thanks