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Matt Towns
Active Member

24 Posts
Posted - 10/31/2013 :  08:46:37 AM  Show Profile  Visit Matt Towns's Homepage  Reply with Quote
have a IC BE school bus with no brake light .brake light relay and fuse are good checked wire from dorman light monitor to rear brake light work fine there have no power to monitor on brake input wire .... any ideas thanks

second.flood
Top Member

USA
640 Posts
Posted - 10/31/2013 :  08:48:38 AM  Show Profile  Reply with Quote
Air brakes?


If it is air, check the sending units at the treadle valve. There are two, check for power and jumper the harness.
Edited by - second.flood on 10/31/2013 08:56:27 AM
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Matt Towns
Active Member

24 Posts
Posted - 10/31/2013 :  08:58:17 AM  Show Profile  Visit Matt Towns's Homepage  Reply with Quote
sorry but where will I find the valve you are talking bout
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Mechan1c
Top Member

USA
853 Posts
Posted - 10/31/2013 :  09:06:41 AM  Show Profile  Reply with Quote
If it's a BE it will be hyd. Do you have a schematic?
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Matt Towns
Active Member

24 Posts
Posted - 10/31/2013 :  09:15:42 AM  Show Profile  Visit Matt Towns's Homepage  Reply with Quote
I checked these close the brake relay thru ground
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Matt Towns
Active Member

24 Posts
Posted - 10/31/2013 :  09:19:58 AM  Show Profile  Visit Matt Towns's Homepage  Reply with Quote
no I do not have a schematic its air... have two buses IC BE series same year model with same problems no brake light or intermittent brake lights
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second.flood
Top Member

USA
640 Posts
Posted - 10/31/2013 :  09:37:33 AM  Show Profile  Reply with Quote
The brake pedal connects to the treadle.
Under the dash.
Replace both senders if faulty.
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Mechan1c
Top Member

USA
853 Posts
Posted - 10/31/2013 :  11:29:20 AM  Show Profile  Reply with Quote
Last 8 of the VIN?
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Matt Towns
Active Member

24 Posts
Posted - 10/31/2013 :  11:41:52 AM  Show Profile  Visit Matt Towns's Homepage  Reply with Quote
9B096984
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Matt Towns
Active Member

24 Posts
Posted - 10/31/2013 :  11:49:46 AM  Show Profile  Visit Matt Towns's Homepage  Reply with Quote
Checked senders at treadle with ohm meter checked good also jumped out plug can hear brake light relay pull in where does this wire go to followed it under the dash could not find where it ends up
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Fastback
Top Member

1500 Posts
Posted - 10/31/2013 :  11:52:22 AM  Show Profile  Reply with Quote
That VIN is for a CE not a BE
Why yes, the ORIGinal CHARGER is a Fastback
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Matt Towns
Active Member

24 Posts
Posted - 10/31/2013 :  12:02:38 PM  Show Profile  Visit Matt Towns's Homepage  Reply with Quote
ok
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second.flood
Top Member

USA
640 Posts
Posted - 10/31/2013 :  4:18:47 PM  Show Profile  Reply with Quote
Did you check to see if the brake lights lit when you jumped the pigtail?
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Matt Towns
Active Member

24 Posts
Posted - 11/01/2013 :  05:52:24 AM  Show Profile  Visit Matt Towns's Homepage  Reply with Quote
no the lights did not work when I jumped the pigtail. where does the dorman light monitor get its brake input signal from
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second.flood
Top Member

USA
640 Posts
Posted - 11/01/2013 :  08:35:11 AM  Show Profile  Reply with Quote
I don't have monitors.

Did you check the fuses on the monitor?

Do the senders have voltage in?
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Matt Towns
Active Member

24 Posts
Posted - 11/01/2013 :  09:36:54 AM  Show Profile  Visit Matt Towns's Homepage  Reply with Quote
new style no fuses on monitor yes senders will activate brake light relay when jumped out no power to terminal 1C on monitor can put 12 v here and all 4 lights will light up
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second.flood
Top Member

USA
640 Posts
Posted - 11/01/2013 :  12:06:14 PM  Show Profile  Reply with Quote
Get any body codes and post them.
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Matt Towns
Active Member

24 Posts
Posted - 11/01/2013 :  12:21:48 PM  Show Profile  Visit Matt Towns's Homepage  Reply with Quote
body codes if your talking bout thru the PCM OR BCM I don't have any way to do that
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Oldiron
Active Member

23 Posts
Posted - 11/01/2013 :  12:28:26 PM  Show Profile  Visit Oldiron's Homepage  Reply with Quote
Check the connectors under the drivers switch panel, They will sometimes get unlocked and seperate causing body lighting issues.
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second.flood
Top Member

USA
640 Posts
Posted - 11/01/2013 :  12:41:46 PM  Show Profile  Reply with Quote
1.1.1. Displaying Codes on the Gauge Cluster (Non-VID equipped vehicles)

To display codes on vehicles not equipped with a VID:

1. Set the parking brake.

2. Turn the key switch to the IGNITION position to view both active and previously active codes.

3. Momentarily press the Cruise "ON" switch and the Cruise "Resume" switch at the same time.

A gauge sweep will be performed on the gauges. The gauge cluster will then display the following information for 5 seconds:


Software Rev: XXX
Hardware Rev: XXX
Active Faults: XXX
Total Faults: XXX
NOTE: The gauge cluster will only display "Software Rev" and "Hardware Rev" for 5 seconds followed by the message "Diagnostic Trouble Codes are not available" if the vehicle is not equipped with the option to display codes.




If faults are present, the gauge cluster display will show each diagnostic trouble code for 10 seconds and then automatically scroll to the next entry and continue to cycle through the faults. Once all faults have been displayed the number of faults will be displayed again, then the cycle will repeat. To manually cycle through the fault list press and release the cluster display selector button. The following information will be displayed for each fault:

SPN: XXXX FMI: XX
Active
OC: XXX SA: XXX


SPN: XXXX FMI: XX
Previously Active
OC: XXX SA: XXX


NOTE: Turning the key switch off, turning the key switch to the CRANK position, or releasing the park brake will take the gauge cluster out of the diagnostic mode.







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Matt Towns
Active Member

24 Posts
Posted - 11/01/2013 :  1:52:46 PM  Show Profile  Visit Matt Towns's Homepage  Reply with Quote
spn:597 FMI:2 OC:13 &18 SA:33....SPN:880 FMI:5 OC15 SA:33 .....SPN:1087 FMI:1 OC:1 SA:1 SPN:1088..SPN 2000 FMI:19 / SPN:2392 FMI:5 SPN:2637 FMI:5 SPN:2641 FMI:6 SPN:520803 FMI:5
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Matt Towns
Active Member

24 Posts
Posted - 11/01/2013 :  2:49:10 PM  Show Profile  Visit Matt Towns's Homepage  Reply with Quote
fixed it found connector parital plugged in looked like it was plugged in put a zip tie around it to prevet further problems ....thanks for the inputs
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Tonya36
New Member

1 Posts
Posted - 01/13/2020 :  11:47:28 AM  Show Profile  Visit Tonya36's Homepage  Reply with Quote
SPN: 597 FMI:2
OC:1 SA: 33
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