Note: A major cause of hidden electrical faults can be traced to faulty electrical connectors.
For example:
- Dirty/corroded terminals
- Damp terminals
- Broken or bent cable pins within multiplugs.
For example, the ABS electronic control module (ABS ECM) relies on the supply of accurate information to enable it to monitor and control the brake system. One dirty terminal will cause an excessive voltage drop resulting in an incorrect signal to the ECM.
If, when carrying out fault diagnosis, a fault appears to clear by simply disconnecting and reconnecting an electrical plug, examine each disconnected plug for the following.
Before Disconnection:
- If testing with a voltmeter, the voltage across a connector battery supply and ground pins should be virtually battery volts with a small deviation allowable for usual voltage drop within wiring circuits. If there is a noticeable change, suspect faulty/dirty connections. Refer to the ABS circuit diagram within this Service Manual for pin numbers.
When Disconnecting a Connector:
- Check for a security device that must be released before the connector can be separated e.g. barb, hook and eye etc.
When Inspecting a Connector:
- Check that the individual pins have not been bent.
- Check for dampness/dirt/corrosion.
- Check cables for security.
- Check cable pin joints for damage.
When Connecting a Connector:
- Ensure there is no dirt around the connector/seal.
- Push together squarely to ensure terminals are not bent or incorrectly located.
- Push the two halves together positively.
Disconnection of ABS ECM connector
Caution! When disconnecting a connector, never pull directly on the wires as this may result in cable and connector damage.
Caution! Never disconnect the ABS ECM when the ignition switch is in the ON position as this may cause multiple fault codes to be logged in the ECM memory. Always disconnect an ECM after disconnecting the battery negative (black) lead first.
1. Press the locking device and move the lever to the rear of the connector while disconnecting it from the ABS ECM.
2. When disconnected, ensure the lever is fully to the rear of the connector. An audible click can be heard when it is locked in position.
![](https://motoinstruction.ru/img/triumph/15/121710.jpg)
1. ABS modulator (shown removed for clarity); 2. Connector; 3. Locking device; 4. Lever
Caution! The ABS ECM is an integral part of the ABS modulator. Under no circumstances should the ECM be removed from the ABS modulator. If a new ECM is required, repair is by replacement of the ABS modulator and ECM as an assembly only.
Reconnection of the ABS ECM Connector
Caution! Damage to the connector pins may result if an attempt to fit the connectors incorrectly is made.
Caution! If the lever is not fully over to the rear position, it is possible that the connector may not fully engage into its socket.
1. Ensure the lever on the connector is fully over to the unlocked position, as shown below:
![](https://motoinstruction.ru/img/triumph/15/121711.jpg)
1. Lever; 2. Connector
2. Align the connector to its socket on the ABS modulator such that the end of the lever aligns with the lug on the socket.
![](https://motoinstruction.ru/img/triumph/15/121712.jpg)
1. Lever end; 2. Lug
3. Release the lever by pushing it towards the front of the connector. At the same time, push the connector into its socket until the lever is fully forward and locked in position. An audible click can be heard when locked.
![](https://motoinstruction.ru/img/triumph/15/121713.jpg)
1. ABS modulator (shown removed for clarity); 2. Connector; 3. Locking device; 4. Lever