| Author | Message | ||
     Edward Mckinley New User Username: ed_mckinley Post Number: 30 Registered: 10-2019 |
Hello, the passenger (right) side seat on my 89 Corniche has stopped working. No clicking, no noise nothing. I have checked the fuses in the dash and tried swapping out the relay under the seat. I have attached a picture of the seat ECU on my car as it seems to be different than the others I have found being discussed on the forum. Any ideas would be great Thanks, Ed  | ||
| Edward Mckinley New User Username: ed_mckinley Post Number: 31 Registered: 10-2019 |
to clarify, if I press any of the seat memory buttons I get some clicking noises down by the seat control module, but no movement and if I try the seat adjustment switches, no clicking no movement at all. in the technical library page 27-8 is supposed to show the right side seat diagram but the page is missing | ||
| michael vass Frequent User Username: mikebentleyturbo2 Post Number: 730 Registered: 07-2015 |
Never seen one like that before. John bowling of bowling Ryan engineering would be worth contacting. Have you googled the part number? Mike | ||
| Edward Mckinley New User Username: ed_mckinley Post Number: 32 Registered: 10-2019 |
Yes I have looked it up on the internet and found a similar unit used on the Cadillac Allante. However, I don't know if the module is the problem. I'm looking for some troubleshooting guidance before replacing the module | ||
| Edward Mckinley New User Username: ed_mckinley Post Number: 33 Registered: 10-2019 |
It appears that the technical library electric portion TSD4701 only includes 87 and 88 model years. The next volume is for the 30,000 series. Does anyone know where I might find the 89 wiring diagram for my car? | ||
| michael vass Frequent User Username: mikebentleyturbo2 Post Number: 731 Registered: 07-2015 |
I think tsd4848 is what you need for a 20000 series 89 car. Mike | ||
| Edward Mckinley New User Username: ed_mckinley Post Number: 34 Registered: 10-2019 |
Yes Michael you are correct, I have found TSD4848 on the internet but only 2 of the pages from section 27 (front seats) are there. The rest of the pages in this section are missing. Does anyone have a complete copy of this manual? | ||
| Edward Mckinley New User Username: ed_mckinley Post Number: 35 Registered: 10-2019 |
swapped drivers and passengers ECU module and still have the same problem so ECU is eliminated as the problem | ||
| michael vass Frequent User Username: mikebentleyturbo2 Post Number: 732 Registered: 07-2015 |
Hi Edward Just looked and I only have 2 pages on seats in my copy. | ||
| Jim Walters Frequent User Username: jim_walters Post Number: 349 Registered: 01-2014 |
IIRC on a Corniche II the relay for the right hand seat is behind the centre console, about even with the right side of the radio faceplate. Black/yellow wire from it feeds the seat switches. SRH8505 SRC18015 SRE22493 NAC-05370 www.bristolmotors.com | ||
| Edward Mckinley New User Username: ed_mckinley Post Number: 36 Registered: 10-2019 |
Thanks Jim, there are 3 relays behind the centre console and I have swapped all 3 as well as the relay under the seat next to the ECU. I have also swapped the seat control switch connector left for right and still no movement. The wires to the relay behind the centre console are not really accessible without removing the console so it looks like that may be my next move. | ||
| Alan Dibley Frequent User Username: alsdibley Post Number: 336 Registered: 10-2009 |
In the non-electronic seats there is a single motor for all of the functions. Is that true for the later electronic systems? If so that is a suspect. Alan D. | ||
| Edward Mckinley New User Username: ed_mckinley Post Number: 37 Registered: 10-2019 |
No, this has multiple motors for each seat function | ||
| Edward Mckinley New User Username: ed_mckinley Post Number: 38 Registered: 10-2019 |
There is no power at the Black/Yellow wire coming from the relay behind the console which feeds the switch so the problem must be upstream from this. Does this come directly from the fuseboard? | ||
| Jim Walters Frequent User Username: jim_walters Post Number: 352 Registered: 01-2014 |
From fuse B1, light green wire to left seat relay, then to right seat relay, from which the black/yellow wire goes to the seat switches. Make sure you have a good ground on the right seat relay, that could be where the fault is if the relay tests good. SRH8505 SRC18015 SRE22493 NAC-05370 www.bristolmotors.com | ||
| Edward Mckinley New User Username: ed_mckinley Post Number: 39 Registered: 10-2019 |
Thanks Jim, I will take a look there tomorrow, I just put her back together so I can take a ride tonight | ||
| Edward Mckinley New User Username: ed_mckinley Post Number: 40 Registered: 10-2019 |
after much searching I removed the center console and found that one of the wires on the center relay had come loose, an easy fix (once you find it)! I did however come across a significant looking ground strap that I'm unsure about the proper location for re-installing. It is coming from behind and above the fuse box and then into the center console area. It is a braided cable with a black sheath around it. |
