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va_redneck
11-24-2005, 02:19 PM
The speedometer in the wife’s H2 started to jitter for several weeks and then it worked for a few days off and on then when dead. All of the other instrument work fine. I and leaning toward replacing the PCM. I have toyed with replacing the OSS sending unit on the transmission but the cruse control still works. From my understanding they both use the same speed pick up module. I have heard that a weak signal may work for the cruse but the speedometer needs a stronger signal.

Does anyone have any ideas if I should replace the sending unit first or will that just be throwing good money after bad?
va_redneck
11-24-2005, 02:19 PM
The speedometer in the wife’s H2 started to jitter for several weeks and then it worked for a few days off and on then when dead. All of the other instrument work fine. I and leaning toward replacing the PCM. I have toyed with replacing the OSS sending unit on the transmission but the cruse control still works. From my understanding they both use the same speed pick up module. I have heard that a weak signal may work for the cruse but the speedometer needs a stronger signal.

Does anyone have any ideas if I should replace the sending unit first or will that just be throwing good money after bad?
VernB
11-24-2005, 02:47 PM
I thought cruse control uses engine vacuum for its sensor, don't no for sure.
4churchill
11-28-2005, 03:21 PM
went through speedo preob on my 2003....just had it replaced when i couldnt take it any more
Hummertech
11-28-2005, 03:28 PM
Replace the PCM if you like wasting money.
Replace the IPC if you want to fix your problem.
PARAGON
11-28-2005, 04:40 PM
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Hummertech:
Replace the PCM if you like wasting money.
Replace the IPC if you want to fix your problem. </div></BLOCKQUOTE>x2
va_redneck
12-02-2005, 12:58 AM
Thanks. I will look intothe IPC.

I wish it did not rack up miles but the odometer and cruse both still function. My dealer recomended the PCM. I could not see how this would be the problem without other issues in shifting or performance.