Do you have any idea which light?
Head light switch. MAC made several different sizes for different makes:
MAC SC1 Chevy/Mopar instrument
MAC SC17 Chevy/Ford instrument
MAC SC18 GM/Buick
MAC SC19 Chevy wiper switch
MAC SC24 Ford, Lincoln & Mercury switches
MAC SC55 Ford light switches
MAC SC74 Chevy instrument panel
MAC SC77 Chevy glove box
MAC SC-78 VOLKSWAGEN OIL FILL SOCKET WRENCH
And so did SO but this is all I have for SO tools:
Snap On 9605A GM/Ford multiple applications, 1/4" drive.
What I have not been able to find are the applications for the Cornwell tools similar to the MAC's:
SP203
SP204
SP205
SP001