131
November 1992 Part No. 917543 Rev. A
B.9. TESTING THE BLEND MOTOR
The blend motor, one for each side of the dispenser, is located in the dispenser junction
box. Before testing or replacing the blend motor, all probable causes and corrective
actions listed under Fault Code 51 in Section 6 Troubleshooting Guide should be consid-
ered. A final test of the blend motor can be performed by measuring the coil resistance as
shown in Figure B-33 below. The blend motor consist of two coils, each having a resis-
tance of 130 ohms. To measure the coil resistance, disconnect the blend motor connector
plug and use an ohmmeter to measure the resistance across pins 1 & 4 and pins 2 & 3.
The readings should be in the range of 127 to 133 ohms. See related blend motor wiring
in Appendix C Internal Wiring Diagrams.
Caution: Disconnect dispenser AC power before opening the junction box.
FIGURE B-33. TESTING THE BLEND MOTOR
REAR COIL
FRONT COIL
Y
Y
W
W
1
4
2
3
Common
V Ω
Ohms
130.0
SGM-FH-108
WIRE
PLUG
JUNCTION BOX
BLEND
MOTOR
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