1979-1993 & 94 Conv [Subscribe to Daily Digest] |
Thanks again, Zig, for the enormous amount of thought you've put into assisting me. I much appreciate it.
I gave up for time being when the temperature inside the garage went down well below freezing. I'll get on it again tomorrow. The thing I'm most worried about now is that maybe by forcing the pump to run for 3-5 minutes using that jumper wire to imitate an activated pump relay, absolutely no more, maybe it got burnt out when previously it worked, although something was obviously wrong. Again, it didn't even get warm during that forced on period, nor did it make unusual sounds. But when I abandoned the project for the moment, I could not get the pump to start up again either with jumper wire jury rig, or with the pump relay properly re-inserted.
Again, following that 3-5 minute forced on, the brake fluid light came on after two strokes on the brake pedal, suggesting that the bomb was bad,. But in that case, if there was little or no reserve hydraulic pressure inside, I probably wouldn't force-failed the pump by over-pressuring. (The volume that the brake fluid reservoir declined when the pump previously went on for 3-5 seconds wasn't more than 50 cc, maximum, and maybe quite a bit less.)
Again, at the instant when the brake assist first failed, using the previous and probably the original acc. bomb, I was not even braking hard or at all, suddenly the brake fluid light came on, and all power boost ceased completely. (The brake fluid reservoir was hardly down at all... no more than 50-100 CCs, I would guess, so there didn't appear to be a failure/leak elsewhere in the brake hydraulics.)
After I replaced the accumulator with a used one from a vendor on ebay whose reputation appeared satisfactory, the brake boost seemed OK, and I drove about 200 km, deciding to cancel a planned 4,000 km motor trip only when the battery ran completely down without any obvious cause, while on my first overnight on the road. I turned around and headed back to identify the cause of that electric problem, and only as I was nearing my home, the brake fluid light came on again
Regarding where my indy mechanic did or did not try connecting up his computer, according to SAAB Parts and Service In formation, Application 900 and 9000 models, 1990-, Section 5, page 2 Subject ABS Diagnostic procedures, Fault Code Retrieval:
"In order to access the stored codes within the ABS system, a two pole diagnostic plug has been added to the car's wiring harness... For 1991, the plug has been relocated under the rear seat, adjacent to the ABS ECU connector...
This appears not to be consistent with your remarks that the main harness has to be removed from the ABS EC and the shop computer connector then inserted in series between the ECU and the harness plug. Although the SAAB manual might be referring only to downloading the ABS error memory through the dash panel warning lights, not the shop diagnostic computer.
posted by 24.1.225...
, Wed, 21 Jan 2009 23:10:05, Thu, 22 Jan 2009 09:39:14
, Wed, 21 Jan 2009 13:47:00
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