Joey Mack Posted March 31, 2022 Share Posted March 31, 2022 pid 100 is oil pressure.. fmi 04 is low voltage... jojo Quote Link to comment Share on other sites More sharing options...
tractor Posted April 1, 2022 Share Posted April 1, 2022 cannot find it how many wires on it Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted April 1, 2022 Share Posted April 1, 2022 it is on top of the oil filter pad, above the centrimax.. 3 wires?? jojo Quote Link to comment Share on other sites More sharing options...
tractor Posted April 2, 2022 Share Posted April 2, 2022 sorry i mean shut down buzzer alot of plug swith nothing in them Quote Link to comment Share on other sites More sharing options...
tractor Posted April 2, 2022 Share Posted April 2, 2022 with Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted April 2, 2022 Share Posted April 2, 2022 the shutdown buzzer is to the left of the clutch pedal on the triangular bracket below the dash .. under the area that has the oil pressure, water temp, and alt. gauges... jojo Quote Link to comment Share on other sites More sharing options...
tractor Posted April 2, 2022 Share Posted April 2, 2022 thanks how many wires in plug a lot of emty plugs there is not alight in socket thanks Quote Link to comment Share on other sites More sharing options...
fjh Posted April 2, 2022 Share Posted April 2, 2022 1 hour ago, Joey Mack said: the shutdown buzzer is to the left of the clutch pedal on the triangular bracket below the dash .. under the area that has the oil pressure, water temp, and alt. gauges... jojo Bro I don't even know what model of truck you guys are working on here? Just remember ! some times the buzzer is in or behind the main dash panel! Sorry real late in this how ever! on the CV the buzzer is sometimes built right in into the dash! Just sayin Quote Link to comment Share on other sites More sharing options...
tractor Posted April 2, 2022 Share Posted April 2, 2022 shut down light has no bulb in shut down light socket so maybe buzzer is not plugged in either Quote Link to comment Share on other sites More sharing options...
tractor Posted April 2, 2022 Share Posted April 2, 2022 model rb688s 1998 Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted April 2, 2022 Share Posted April 2, 2022 its common for drivers to unplug the buzzer, because it is loud and 'sounds' when the turn signal is on.. its annoying,, but also needs to be plugged in 'by law'' ,, just sayin, jojo 1 1 Quote Link to comment Share on other sites More sharing options...
tractor Posted April 4, 2022 Share Posted April 4, 2022 how many prongs on 2 or 4 buzzer or plug thanks Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted April 4, 2022 Share Posted April 4, 2022 i think its 8, have you still not found it? Quote Link to comment Share on other sites More sharing options...
tractor Posted April 4, 2022 Share Posted April 4, 2022 no just a few plugs one plug is redish Quote Link to comment Share on other sites More sharing options...
tractor Posted April 4, 2022 Share Posted April 4, 2022 the redish plug has 8 holes and seven connecter Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted April 4, 2022 Share Posted April 4, 2022 I guess im not sure,, i thought you have an RB,,,R-model,,, any R-Model I worked on, the buzzer is in front of the clutch pedal, under the dash, on a triangular bracket. no need to remove a dash panel, just lay on the floor and look up at the bottom corner.. its right there.. above the vent door, if you have the vent down there that you kick open.. I wish I had a picture of its location. there is the chance that it is missing, but the wide plug should be there.. jojo 1 Quote Link to comment Share on other sites More sharing options...
tractor Posted April 4, 2022 Share Posted April 4, 2022 talked to previous owner he unplugged buzzer it came on with single lights power divider low air is this normal . now on all the time . it was plug i was talking about. engine is a e7-400 ser 8r3453 truck model rb688s .code pid 1oo fmi 04 low voltage detected at oil pressure sensor, sid 238 04 voltage below normal or shorted to ground would any of these derate horse power thanks bruce Quote Link to comment Share on other sites More sharing options...
tractor Posted April 4, 2022 Share Posted April 4, 2022 truck is 1998 Quote Link to comment Share on other sites More sharing options...
tractor Posted April 4, 2022 Share Posted April 4, 2022 engine runs fine but down on power no leaks air to air or compressor hose went from 35 to 33 psi turbo just those two codes would like wiring diagram for buzzer Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted April 4, 2022 Share Posted April 4, 2022 the buzzer is called a "Multi buzzer" it buzz's for many reasons and funtions... my diagrams are very large and dont photograph well.. I dont know how a faulty buzzer would reduce engine power... jojo Quote Link to comment Share on other sites More sharing options...
Onyx610 Posted April 5, 2022 Share Posted April 5, 2022 10 hours ago, tractor said: engine runs fine but down on power no leaks air to air or compressor hose went from 35 to 33 psi turbo just those two codes would like wiring diagram for buzzer When you say “air to air” is that just the CAC? If so you have only checked half of the charge air system. Turbo could be getting worn, boost leaks at turbo/before CAC, or boost leaks after CAC/at intake manifold. Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted April 5, 2022 Share Posted April 5, 2022 also, the air compressor may get its air from the manifold,, check the connection.. jojo Quote Link to comment Share on other sites More sharing options...
Onyx610 Posted April 5, 2022 Share Posted April 5, 2022 Check fuel pressure too. These ones were also notorious for gear spin on the shaft of fuel pump. Quote Link to comment Share on other sites More sharing options...
mechohaulic Posted April 5, 2022 Share Posted April 5, 2022 On 3/24/2022 at 9:21 AM, Joey Mack said: i wish i could see it... my other question, was about small braided oil lines going through the spacer to the top of the engine brake housing. any way.... oil will squirt from the top of the celenoids,, if it is coming out anywhere else, that will cause poor performance. if you have a leak, get the oring packs and replace them. jojo once again never too old to learn new. have installed jakes; even trip to factory here in CT yrs ago when they were made here. question JOJO ; the braided line, is that how units are oil fed today;; no more o-ring fitting coming from underside? Quote Link to comment Share on other sites More sharing options...
Onyx610 Posted April 5, 2022 Share Posted April 5, 2022 (edited) No braided line. That was just an update for a specific jake/engine Edited April 5, 2022 by Onyx610 1 Quote Link to comment Share on other sites More sharing options...
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