Factory Lockers Question (1 Viewer)
- Thread starter FryT
- Start date
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ppc
M Go Blue
Yes they will lock in high or low but the center diff needs to be locked first with the dash light illuminated.
You need to lock the cdl in high before the f&r lock
What year truck? Do you have a Center Diff Lock switch installed? It came stock in the early trucks but can be easily added to the later trucks using the Pin-7 mod (and people use all kinds of switches that don't necessarily say CDL!). If you don't have a CDL switch, you never locked any diff in 4H with the OEM arrangement. OEM style for 93-97 is the CDL is automatic when put into 4LO, and the diff locks will work from there.
From off, turn the key to the ACC position. Do you see 3 diff lock lights on the xmas tree display of idiot lights? If not, then you might have a burnt out idiot light diff lock bulb which could be affecting the operation of the diff locks. I want to say that the signals are routed through the bulbs, meaning that a dead bulb can prevent downstream function.
the front and rear lockers are only looking to see that the center diff is locked before they will even begin to actuate. If the center diff lock light goes off then the front and rear lockers will either unlock or they won't function.
