Hummer Forums by Elcova - TSB - Trailer Brakes Applied When GM Accessory Roof-Mounted Off-Road Spot Lamps are on

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<TD align=middle width="50%">Document ID# 1459306
2003 HUMMER
H2
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<H1>Trailer Brakes Applied When GM Accessory Roof-Mounted Off-Road Spot Lamps
are On (Modify Roof-Mounted Off-Road Spot Lamp Wiring Harness) #04-08-42-003 -
(02/13/2004)</H1></TABLE>Trailer Brakes Applied When GM Accessory Roof-Mounted
Off-Road Spot Lamps are On (Modify Roof-Mounted Off-Road Spot Lamp Wiring
Harness)

2003 HUMMER H2</P>

with Roof-Mounted Off-Road Spot Lamp Package</P><A name=ss1-1459306><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459306&pubid=293&evc=sm#ss1-1459306">
<H5>Condition</A></H5>

Some customers may comment that when the roof-mounted off-road spot lamps are
on, the electronic brakes on the trailer are always applied.</P><A
name=ss2-1459306><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459306&pubid=293&evc=sm#ss2-1459306">
<H5>Cause</A></H5>

The cause of this condition may be due to the roof-mounted off-road spot lamp
wiring harness and the electronic brake controller wiring harness using the same
Mid BEC connector cavity. If a customer attempts to tow a trailer equipped with
electronic brakes and does not use a controller (requiring them to remove the
roof-mounted off-road spot lamp wiring harness from the Mid BEC), the trailer's
electronic brakes will be activated when the Roof-Mounted Off-Road Spot Lamps
are turned on.</P><A name=ss3-1459306><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459306&pubid=293&evc=sm#ss3-1459306">
<H5>Correction</A></H5>

To prevent activation of the trailer's electronic brakes, a modification to
the off-road spot lamp wiring harness must be performed. Use the procedure
listed below.</P>

<LI type=1>Remove the lower left side I/P MID-BEC (electrical center) cover.
<LI type=1>Remove the brown connector (C7) from the MID-BEC.
<LI type=1>Remove the blue terminal lock from the connector.
<LI type=1>Remove the purple wire (CKT2234) and terminal from cavity C
in the connector.
<LI type=1>Reinstall the terminal lock into the connector.
<LI type=1>Cut the terminal off the purple wire.
<LI type=1>Insert the purple wire into heat shrink tubing and heat the tubing
until it sufficiently wraps the wire.
<LI type=1>Tape the purple wire back 75mm (3in) from the
connector.
<LI type=1>Reconnect the connector into the MID-BEC. Make sure the connector
is fully seated and engaged. </LI>

<A name=ss4-1459306><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459306&pubid=293&evc=sm#ss4-1459306">
<H5>Parts Information</A></H5>

Two new part numbers have been released for Roof-Mounted Off-Road Spot Lamp
package kits. These new kits contain a revised wiring harness. Use this
information when ordering new kits.</P>
<TABLE width="100%" border=1>
<TBODY>
<TR>
<TH vAlign=bottom align=middle>

Part Number</P></TH>
<TH vAlign=bottom align=middle>

Description</P></TH></TR>
<TR>
<TD vAlign=center align=middle>

89006968</P></TD>
<TD vAlign=center align=middle>

Lamp Kit, Roof-Mounted Off-Road (Bright)</P></TD></TR>
<TR>
<TD vAlign=center align=middle>

89006969</P></TD>
<TD vAlign=center align=middle>

Lamp Kit, Roof-Mounted Off-Road (Black)</P></TD></TR></TBODY></TABLE>

Parts are currently available from GMSPO.</P><A name=ss5-1459306><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459306&pubid=293&evc=sm#ss5-1459306">
<H5>Warranty Information</A></H5>

For vehicles repaired under warranty, use:</P>
<TABLE width="100%" border=1>
<TBODY>
<TR>
<TH vAlign=bottom align=middle>

Labor Operation</P></TH>
<TH vAlign=bottom align=middle>

Description</P></TH>
<TH vAlign=bottom align=middle>

Labor Time</P></TH></TR>
<TR>
<TD vAlign=center align=middle>

N8513</P></TD>
<TD vAlign=center align=middle>

Wiring Harness, Roof-Mounted Off-Road Spot Lamp -- Repair</P></TD>
<TD vAlign=center align=middle>

0.3hr</P></TD></TR></TBODY></TABLE>

</P>
<TABLE width="100%">
<TBODY>
<TR>
<TD align=left width=778><FONT size=1>GM bulletins are intended for use by
professional technicians, NOT a "do-it-yourselfer". They are written
to inform these technicians of conditions that may occur on some vehicles,
or to provide information that could assist in the proper service of a
vehicle. Properly trained technicians have the equipment, tools,
safety instructions, and know-how to do a job properly and safely.
If a condition is described, DO NOT assume that the bulletin applies to
your vehicle, or that your vehicle will have that condition. See
your GM dealer for information on whether your vehicle may benefit from
the information.
</FONT></TD>
<TD align=middle width=42>[img]Trailer Brakes Applied When GM Accessory Roof-Mounted Off-Road Spot Lamps are On [Modify Roof-Mounted Off-Road Spot Lamp Wiring Harness) #04-08-42-003 - [02-13-2004)_files/TifToGif.gif[/img] </TD>
<TD align=middle width=167><FONT size=2>WE SUPPORT VOLUNTARY TECHNICIAN
CERTIFICATION
</FONT></TD></TR></TBODY></TABLE>
<P align=center>© Copyright General Motors Corporation. All Rights
Reserved. </P>
<FORM name=bottomNavForm>
<HR>

<TABLE width="100%" align=center>
<TBODY>
<TR>
<TD width="25%" slign="LEFT"></TD>
<TD align=middle width="50%">Document ID# 1459306
2003 HUMMER
H2
</TD>
<TD align=right width="25%"></TD></TR></TBODY></TABLE></FORM></BODY></HTML>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">

<HTML><HEAD><TITLE>Service Information</TITLE>
<META http-equiv=Content-Type content="text/html; charset=windows-1252">
<META content="Microsoft FrontPage 5.0" name=GENERATOR></HEAD>
<BODY bgColor=#ffffff>
<FORM name=topNavForm action=/servlets/CellHandler>
<TABLE width="100%" align=center>
<TBODY>
<TR>
<TD width="25%" slign="LEFT"></TD>
<TD align=middle width="50%">Document ID# 1459306
2003 HUMMER
H2
</TD>
<TD align=right width="25%"></TD></TR></TBODY></TABLE>
<HR>
</FORM>
<H1>Trailer Brakes Applied When GM Accessory Roof-Mounted Off-Road Spot Lamps
are On (Modify Roof-Mounted Off-Road Spot Lamp Wiring Harness) #04-08-42-003 -
(02/13/2004)</H1></TABLE>Trailer Brakes Applied When GM Accessory Roof-Mounted
Off-Road Spot Lamps are On (Modify Roof-Mounted Off-Road Spot Lamp Wiring
Harness)

2003 HUMMER H2</P>

with Roof-Mounted Off-Road Spot Lamp Package</P><A name=ss1-1459306><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459306&pubid=293&evc= sm#ss1-1459306">
<H5>Condition</A></H5>

Some customers may comment that when the roof-mounted off-road spot lamps are
on, the electronic brakes on the trailer are always applied.</P><A
name=ss2-1459306><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459306&pubid=293&evc= sm#ss2-1459306">
<H5>Cause</A></H5>

The cause of this condition may be due to the roof-mounted off-road spot lamp
wiring harness and the electronic brake controller wiring harness using the same
Mid BEC connector cavity. If a customer attempts to tow a trailer equipped with
electronic brakes and does not use a controller (requiring them to remove the
roof-mounted off-road spot lamp wiring harness from the Mid BEC), the trailer's
electronic brakes will be activated when the Roof-Mounted Off-Road Spot Lamps
are turned on.</P><A name=ss3-1459306><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459306&pubid=293&evc= sm#ss3-1459306">
<H5>Correction</A></H5>

To prevent activation of the trailer's electronic brakes, a modification to
the off-road spot lamp wiring harness must be performed. Use the procedure
listed below.</P>

<LI type=1>Remove the lower left side I/P MID-BEC (electrical center) cover.
<LI type=1>Remove the brown connector (C7) from the MID-BEC.
<LI type=1>Remove the blue terminal lock from the connector.
<LI type=1>Remove the purple wire (CKT2234) and terminal from cavity C
in the connector.
<LI type=1>Reinstall the terminal lock into the connector.
<LI type=1>Cut the terminal off the purple wire.
<LI type=1>Insert the purple wire into heat shrink tubing and heat the tubing
until it sufficiently wraps the wire.
<LI type=1>Tape the purple wire back 75mm (3in) from the
connector.
<LI type=1>Reconnect the connector into the MID-BEC. Make sure the connector
is fully seated and engaged. </LI>

<A name=ss4-1459306><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459306&pubid=293&evc= sm#ss4-1459306">
<H5>Parts Information</A></H5>

Two new part numbers have been released for Roof-Mounted Off-Road Spot Lamp
package kits. These new kits contain a revised wiring harness. Use this
information when ordering new kits.</P>
<TABLE width="100%" border=1>
<TBODY>
<TR>
<TH vAlign=bottom align=middle>

Part Number</P></TH>
<TH vAlign=bottom align=middle>

Description</P></TH></TR>
<TR>
<TD vAlign=center align=middle>

89006968</P></TD>
<TD vAlign=center align=middle>

Lamp Kit, Roof-Mounted Off-Road (Bright)</P></TD></TR>
<TR>
<TD vAlign=center align=middle>

89006969</P></TD>
<TD vAlign=center align=middle>

Lamp Kit, Roof-Mounted Off-Road (Black)</P></TD></TR></TBODY></TABLE>

Parts are currently available from GMSPO.</P><A name=ss5-1459306><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459306&pubid=293&evc= sm#ss5-1459306">
<H5>Warranty Information</A></H5>

For vehicles repaired under warranty, use:</P>
<TABLE width="100%" border=1>
<TBODY>
<TR>
<TH vAlign=bottom align=middle>

Labor Operation</P></TH>
<TH vAlign=bottom align=middle>

Description</P></TH>
<TH vAlign=bottom align=middle>

Labor Time</P></TH></TR>
<TR>
<TD vAlign=center align=middle>

N8513</P></TD>
<TD vAlign=center align=middle>

Wiring Harness, Roof-Mounted Off-Road Spot Lamp -- Repair</P></TD>
<TD vAlign=center align=middle>

0.3hr</P></TD></TR></TBODY></TABLE>

</P>
<TABLE width="100%">
<TBODY>
<TR>
<TD align=left width=778><FONT size=1>GM bulletins are intended for use by
professional technicians, NOT a "do-it-yourselfer". They are written
to inform these technicians of conditions that may occur on some vehicles,
or to provide information that could assist in the proper service of a
vehicle. Properly trained technicians have the equipment, tools,
safety instructions, and know-how to do a job properly and safely.
If a condition is described, DO NOT assume that the bulletin applies to
your vehicle, or that your vehicle will have that condition. See
your GM dealer for information on whether your vehicle may benefit from
the information.
</FONT></TD>
<TD align=middle width=42>[img]Trailer Brakes Applied When GM Accessory Roof-Mounted Off-Road Spot Lamps are On [Modify Roof-Mounted Off-Road Spot Lamp Wiring Harness) #04-08-42-003 - [02-13-2004)_files/TifToGif.gif[/img] </TD>
<TD align=middle width=167><FONT size=2>WE SUPPORT VOLUNTARY TECHNICIAN
CERTIFICATION
</FONT></TD></TR></TBODY></TABLE>
<P align=center>© Copyright General Motors Corporation. All Rights
Reserved. </P>
<FORM name=bottomNavForm>
<HR>

<TABLE width="100%" align=center>
<TBODY>
<TR>
<TD width="25%" slign="LEFT"></TD>
<TD align=middle width="50%">Document ID# 1459306
2003 HUMMER
H2
</TD>
<TD align=right width="25%"></TD></TR></TBODY></TABLE></FORM></BODY></HTML>

Klaus, what about the front off road light option that uses the same plug in that the roof harness would use? Does that engage the brakes as well?

03 H2