code 61 abs after c5 brake upgrade
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Joined: Jan 2010
Posts: 90
Likes: 4
From: Henderson Nevada
code 61 abs after c5 brake upgrade
I just performed the c5 front brake upgrade on my 1990 vert without traction control. I replaced all 4 rotors,calipers,steel braded brake lines,and bias spring in the master. system was bled well and speed bleeders were added. the brakes feel great but now im getting this code on ABS. I did notice some fraying on the left front wheel sensor wire but didnt appear to go all the way through. My service manual doesnt indicate wheel sensor error just code 61. I have an extra abs unit and harness but no extra sensors. The manual mentions the relays but to be honest im not sure which relay or motor is what on the pump. Any help would be greatly appreciated.
Melting Slicks
Joined: Aug 1999
Posts: 2,240
Likes: 42
From: Baltimore, MD USA
ABS Code 61 is a problem with the ABS Pump Motor relay circuit.
The ABS Control module monitors the voltage at the output
of the Pump Motor relay.
1) 61 indicates there is no 12 volts at the output of the relay
pin #30 when the relay is energized. (Bad relay or fusible link).
2) Or there is 12 volts at the output of the relay pin #30 when
the relay is not closed. (Relay stuck closed).
(If this was the problem, the ABS pump would always be
running).
For symptom #1 remove the ABS Pump Motor relay and verify
there is 12 volts on pin# 87 of the Pump Motor relay socket.
The 12 volts comes from fusible link J at the battery jumper
block and is hot at all times. The battery jumper block is
behind and below the battery where a bunch of fusible links
are bolted to a stud. The fusible links are not numbered and are
all the same color.
Here's a picture of the ABS Pump Motor relay and the schematic of
the circuit.
The ABS Control module monitors the voltage at the output
of the Pump Motor relay.
1) 61 indicates there is no 12 volts at the output of the relay
pin #30 when the relay is energized. (Bad relay or fusible link).
2) Or there is 12 volts at the output of the relay pin #30 when
the relay is not closed. (Relay stuck closed).
(If this was the problem, the ABS pump would always be
running).
For symptom #1 remove the ABS Pump Motor relay and verify
there is 12 volts on pin# 87 of the Pump Motor relay socket.
The 12 volts comes from fusible link J at the battery jumper
block and is hot at all times. The battery jumper block is
behind and below the battery where a bunch of fusible links
are bolted to a stud. The fusible links are not numbered and are
all the same color.
Here's a picture of the ABS Pump Motor relay and the schematic of
the circuit.
Last edited by Hooked on Vettes; Apr 20, 2012 at 11:40 AM.
