Ford 2003 Mustang Workshop Manual page 2046

reading is still greater than 0.5 volts when checked at the M-terminal and less than 0.5 volts
when checked at the B-terminal, the concern is in the solenoid contacts. Install a new starter
motor. Refer to
9. Clean the positive (+) battery cable connections. Repeat the test at the starter solenoid B
terminal. If the voltage is greater than 0.5 volts, install a new positive battery cable.
Starter Motor—Ground Circuit
A slow cranking condition can be caused by resistance in the ground or return portion of the cranking
circuit. Check the voltage drop in the ground circuit as follows:
1. Connect the Digital Multimeter positive lead to the starter motor housing (the connection must
be clean and free of rust or grease). Connect the negative lead to the negative (-) battery
terminal.
Item Part Number
1 105-R0057
2 10653
3 —
4 —
5 —
6 —
2. Engage the remote starter switch. Read and record the voltage. The voltage reading should be
less than 0.3 volts.
3. If the voltage is greater than 0.3 volts, clean the negative cable connections at the battery, body
ground connections, and the starter ground connections. Retest.
4. If the voltage is greater than 0.3 volts, install a new cable. If the voltage reading is less than 0.2
volts and the engine still cranks slowly, install a new starter motor. Refer to
or Starter Motor—4.6L
Starter Motor—3.8L or
Digital multimeter
Battery
S-terminal
M-terminal
B-terminal
Remote starter switch
.
Starter Motor—4.6L .
Description
Starter Motor—3.8L