[928uk] ABS Relay

[Donald Peach]

Many thanks, Smiffy and Vince. The same fault occured on mine last year, 
but on bench testing the relay, it functioned and the fault didn't occur 
again after placing it back on the car.

I have just phoned the OPC and they quoted £86.36 with delivery for 
Tuesday, so as you say, Smiffy, with 10% discount, worth buying new. 
With confirmed availability and delivery, I have now broken into the 
relay housing and it is indeed not closing with 12v feed.

This has all happened with just one week until MoT due, but I would 
rather not try and fool the tester, as I have good rapport with them and 
the 928.

Many thanks for your advice.

Regards,

Don.


On 07/06/2024 16:22, Paul R Smith via 928uk wrote:
> 03 is the correct replacement, at £86.83 list price (you should be 
> able to get 10% off for club membership at the OPC).
>
> It's just a normal relay but with a Zener diode and heat sink added, 
> presumably because the ABS solenoids generate lots of voltage spike 
> when they operate. If you want to save money you can connect in a 
> socket for a standard relay, leaving the existing relay containing the 
> Zener diode. A second hand one would need to be significantly cheaper 
> than the new one to be worth the risk that it will go soon.
>
> On 07/06/2024 16:08, Donald Peach via 928uk wrote:
>> Hi.
>>
>> I have an ABS warning and before I jump in and possibly create more 
>> problems I thought I would ask for help. My ABS light is on from key 
>> in ignition and doesn't go out on start up. I believe that this 
>> indicates a relay fault; on bench test I have connected a 12v supply 
>> and it is not switching in and out.
>>
>> I haven't been able to pull the cover off - it would need 
>> considerable force or manipulation, so I am looking at a replacement. 
>> Part No. 928 615 124 01. There are several secondhand relays on offer 
>> at £50+, and I can't find new, except with 928 615 124 03 (Ci. 
>> £80.00). Has anyone had a similar issue and can say that this an 
>> acceptable replacement, please?
>>
>> The date on my relay is original for the car, 22.01.88.
>>
>> Many thanks,
>>
>> Don.
>>
>> 1988, Manual S4.
>>