You probably have a bad ASCD controller (the computer box under the dash
board, right side of steering wheel). I fought w/ my system on my 90 GXE for
years and never could get it to work using salvage parts. I wasn't willing
to pony up $400 for a new part from Nissan that I would hardly use. Then I
sold the car which fixed my problem.
You could try putting in a salvage controller from eBay or a salvage yard
after you do all the testing.

Chris
94 GXE, 06 SE.....whoosh

If the light engages, the switch should not be the problem.  Have you
checked the vacuum actuator and the cable itself?

Good luck

get under the dash and look at the 2 switches on the brake pedal and or
clutch pedal, there are these little plastic buttons that depress the
switches, if one of them is missing replace it and recheck. You may find the
problem fixed

fs:

I just bought a 93 Maxima with a broken cruise control.

Am assuming a 92 has similar wiring to the 93.

There are 2 switches operated by the brake pedal, one is a stop lamp switch,
the other is the ASCD Cancel switch.

Check the continuity across the ASCD Cancel switch terminals (the one with
these 2 colored wires: LT GRN/RED & BLU/ORG).

The switch is normally CLOSED (that is, when the brake pedal is NOT
depressed). When you step on the pedal the switch opens.

This switch normally passes 12V to the Cruise Cancel terminal on the ASCD
Control Module. When the brake pedal is depressed, this 12V is interrupted
and causes the Cruise to disengage (if it was engaged). If the switch is bad
(i.e. open all the time), the Cruise will never engage.

If the switch reads open, you can restore system operation by shorting out
the terminals on the connector. This basically takes the switch out of the
system. This is the problem I had and this fix works.

I believe the switch is used as a fail-safe switch. In other words, it is a
backup to the stop lamp switch. Either switch will disengage the system. But
if the stop lamp switch failed, it would not disengage the system. Thus,
they put in another switch (the ASCD cancel) which, if it failed, it fails
open, not closed, and thus disengages the system.

I think Nissan wanted to be sure that when the brake pedal is depressed, the
system would disengage because of the absence of voltage, not the presence
of voltage.

Anyway, jumpering this switch corrected my problem. I am not going to bother
to replace the switch, because there are 4 other ways to disengage the
cruise:

1) Put transmission in neutral
2) Hit cancel button (on my steering wheel)
3) Step on the brake pedal (stop lamp switch still works)
4) Turn off Cruise Control using dashboard switch

I can live without a 5th way.

Good Luck

Mark