KarlosG60 2 Posted November 12, 2020 Hi, After cluster gauge replacement, I listened again electrical noises at the start-time first try. I listen it carefully and I think it is the relay 80. So I don't know if the new fuel pump (another thing I replaced before the cluster gauge), maybe using different voltages or something else and the relay it's too old to manage them, so I thought about changing the relay. VW Classic Parts don't have it, so I called my Volkswagen dealer and they have one in stock by 50 euros. I search the relay reference (191906383C) and I found Hella brand by 15 euros. So, it is risky to buy the Hella, or it's more risky to buy a VW original relay which we don't know when was made? Quote Share this post Link to post Share on other sites
KarlosG60 2 Posted November 12, 2020 And after replace the cluster gauge: Quote Share this post Link to post Share on other sites
KarlosG60 2 Posted November 12, 2020 At first video you see old relay reference, 191 906 383, which was replaced by 191 906 383 C. Maybe because the first one fails? Quote Share this post Link to post Share on other sites
fendervg 29 Posted November 12, 2020 The part number suffix (letter) can change to indicate a later version or substitution. Hella are a good brand - chances are the VW one is made by them or by Bosch, so I wouldn't worry about quality. The relay can go bad over time - a good way to test this is to jumper the connection the relay makes with a short length of wire - this should run your pump directly. It's a fairly common relay and should be easy to source. 1 Quote Share this post Link to post Share on other sites
KarlosG60 2 Posted November 12, 2020 (edited) Thanks. I will try to test the relay (I don't know how, I will google it) and maybe buy the Hella, because is cheap. Edited November 12, 2020 by KarlosG60 Quote Share this post Link to post Share on other sites
fendervg 29 Posted November 12, 2020 I'd say don't bother testing, just replace it with a new one - that noise it's making in your video is not good. 1 Quote Share this post Link to post Share on other sites
KarlosG60 2 Posted November 24, 2020 (edited) Relay is replaced for new one from Hella (15euros). The relay makes more louder sound when you turn ignition key to ON. The ugly electrical noise didn't come again, but I cannot be sure if is because the new relay or because I fill the tank with 20L before. Later I will check the old relay, but it seems it is not working correctly. Edited November 24, 2020 by KarlosG60 Quote Share this post Link to post Share on other sites
fendervg 29 Posted November 24, 2020 Filling with petrol is always good when troubleshooting a non-start scenario 😉 1 Quote Share this post Link to post Share on other sites
