1992 Dodge Dynasty

Electrical problem
1992 Dodge Dynasty 4 cyl Wheel Drive Type unknown Automatic 150k miles

windshield wipers dont work. The fuse tested ok. Using delay control causes an interior faint sound around middle of firewall-- it looks like there are two wires going into wiper motor which is very hard to reach---can I test these wires for current by carefully piercing with probe to see if there is current at the motor when I turn wiper control on--would one of these wires happen to be a ground or does the system work by a methiod which has the motor grounded already--if the motor is grounded all the time--does the second wire going in to the motor provide current to operate in the delay mode?
February 1, 2008.

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