Hmmmm. It seems that there is more than one recall that has something to
do with the windeshield wipers. I found this fairly recent one too:
Electric fault spurs big GM recall
Fri Aug 29, 2008 1:02pm EDT
DETROIT (Reuters) - General Motors Corp is recalling 857,735 vehicles
equipped with a heated windshield wiper fluid system for a potential
short-circuit problem, according to federal safety regulators.
A short-circuit in the system may cause other electrical features to
malfunction, create an odor or cause smoke, increasing the risk of a
fire, the National Highway Traffic Safety Administration said on its
website.
The recall involves the 2007-2008 model year Chevrolet Silverado, Tahoe,
Avalanche and Suburban, Cadillac Escalade, Escalade ESV and Escalade
EXT, GMC Acadia, Sierra, Yukon, Yukon XL and Saturn Outlook; 2006-2008
Hummer H2, Cadillac DTS and Buick Lucerne; and the 2008 Buick Enclave.
GM plans to install a wire harness with an in-line fuse free of charge
to fix the problem, NHTSA said.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Chris Mahanna
Sent: Wednesday, March 18, 2009 8:09 PM
To: [log in to unmask]
Subject: Re: [TN] Using CEM-1 in Pb-free Wave Solder?
Don't overlook the obvious-
It is amazing the risks that automotive will take to save a dime. I
suppose they have to. As I recall, the product was not changed to a
double-sided board until after the recall, obviously because it was cost
prohibitive.
Chris
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Werner Engelmaier /*
Sent: Wednesday, March 18, 2009 8:34 PM
To: [log in to unmask]
Subject: Re: [TN] Using CEM-1 in Pb-free Wave Solder?
Hi Lee,
The 4+ million recall was forced by NHTSA-what happened was that the
windshield wipers stopped working---sometimes in less than one year.
In terms of technical documentation; I use it as a case study in my
'Root Cause Analysis' workshop.
No preproduction certification that I know of; and if they did they
obviously did not know what they were doing---but that, of course, is
not unique to GM.
Werner
-----Original Message-----
From: Lee parker <[log in to unmask]>
To: [log in to unmask]
Sent: Wed, 18 Mar 2009 8:21 pm
Subject: Re: [TN] Using CEM-1 in Pb-free Wave Solder?
Werner
Has this GM issue been documented anywhere.
Also, I am wondering why the laminate manufactures have not responded to
this inquiry.
I have worked with many customers who have had CEM-1 boards built in
Asia and I am not aware of any adverse effects although none were
automotive. Generally, we were careful to be sure that the material was
compatible with the specified environment. Was any preproduction
certification performed in the case you mentioned below?
Best regards
Lee
JLP Consultants LLC
804 779 3389
----- Original Message -----
From: Werner Engelmaier /*<mailto:[log in to unmask]>
To: [log in to unmask]<mailto:[log in to unmask]>
Sent: Wednesday, March 18, 2009 3:08 PM
Subject: Re: [TN] Using CEM-1 in Pb-free Wave Solder?
Hi Eric,
IPC has quality Classes 1 through 3; CEM-1 with unsupported holes is
Class -1.
This is the same material
/design combination that resulted in GM having to recall over 4 million
SUVs and trucks.
CEM-1 not only has a high CTE, but also is hygroscopic and swells
significantly when absorbing moisture-bad combination for Pb-free T's
and automotive application.
Werner
-----Original Message-----
From: Honsowetz, Eric
<[log in to unmask]<mailto:[log in to unmask]>>
To: [log in to unmask]<mailto:[log in to unmask]>
Sent: Wed, 18 Mar 2009 2:59 pm
Subject: [TN] Using CEM-1 in Pb-free Wave Solder?
Good Afternoon Technetters;
So having been googling through this question for a couple of days off
an on I am turning to that one definite source of knowledge, you
all...
What are the ideas regarding using CEM-1 material in a Pb-free (SAC)
wave soldering process for a high reliability product (Automotive - 15
year life without failure). This would be a copper on one side board
with through-hole parts only.
BTW googling provides the best of both worlds...people saying "yes"
and
others saying "no" so whatever your answer you can't be wrong. :)
Best Regards,
eric
248-447-1038 (desk)
734-223-5599 (cell)
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