Kesley Hayes ABS

OK, 95 Tahoe, Kesley Hayes ABS.
ABSMIL is on with a code 68. pump failure.
Sometimes it passes its 3mph pump test, some times it doesnt.
Brakes are good. Seems to have started during one of the colder (teens) mornings.
Anyone experiance this problem?
TIA
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Check EBCM grounds & conectors. Thease can cause intermittant problems.Also check ground for pump motor.
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