Electrical Connnectors - Stabilant 22A Contact Enhancer
GROUP 61General Electrical Systems
Bulletin Number
61 05 00
Woodcliff Lake, NJ
Service Engineering
July 2000
This Service Information bulletins supersedes S.I. 61 05 00 dated May 2000.
SUBJECT
Stabilant 22A Electrical Contact Enhancer
MODEL
All
GENERAL INFORMATION
Connectors carrying low current, are particularly susceptible to the formation of deposits. These deposits affect the resistance of the circuit running through the plug connector and, depending on the sensitivity of the particular circuit, can cause system malfunctions (very often intermittent in nature), and the activation of warning lamps and check control indicators. Airbag circuits and sensor circuits are typical examples of low current circuits.
In many cases, part replacement may temporarily cure the problem, not because the part was faulty, but because the wiping action of disconnecting and reconnecting the connector wipes clean the metal to metal surfaces within the connector itself.
Where the connector may be the cause of the vehicle problem:
-- Without disconnecting the connector, if possible, measure the resistance of the circuit running through the connector to confirm the connector has high resistance. A good connector will have close to zero ohms resistance.
-- Remove both male and female terminals from the connector housing and visually examine them to confirm the integrity of the wire crimps, and in the case of certain types of male terminal, the integrity of the weld of the male pin to the terminal itself. Reinstall the terminals in their housings.
-- Liberally spray both male and female connectors with a zero residue electrical contact cleaner.
-- Allow to air dry. Do not dry with shop air supply as this may recontaminate the connector.
-- Read and understand any Stabilant 22A safety precautions provided by the manufacturer.
-- Apply Stabilant 22A to both male and female connectors so the terminals are completely wet. A cotton swab may be used if required.
-- Reconnect the connectors while still wet.
Stabilant 22A evaporates and leaves a thin polymer film which is conductive between the mating surfaces, while staying non-conductive between adjacent pins. At the same time it prevents the formation of any further harmful deposits.
NOTE:
Stabilant 22A must not be used on Oxygen Sensor connectors. To function, oxygen sensors require a flow of oxygen through the terminal connector to the sensor element. Stabilant 22A will affect this flow of oxygen, and will result in irreparable damage to the sensor.
Stabilant 22A may be obtained directly from Wurth USA., Inc:
Wurth P/N - 893622
An initial supply consisting of:
(1) bottle P/N 593622 Stabilant 22A
(1) can P/N 89365 Wurth Zero Residue Electrical Contact
Cleaner will be shipped by Wurth USA
to
each BMW Center under the Automatic Shipment Program
WARRANTY INFORMATION
Stabilant 22A may be claimed when used in conjunction with repairs performed under the terms of the BMW New Vehicle Limited Warranty.
The sublet allowance claimed for Stabilant 22A, should reflect the value of the product used for the repair, up to a maximum of $2.