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Raybo
Samba Member
Joined: December 27, 2007
Posts: 3
Location: Ohio
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 Posted: Wed Jul 05, 2017 12:55 pm Post subject: 1999 cabrio..No ground to relay under dash |
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| Hello.. Trying to figure out why I have no ground to the relay for fuel pump under dash of my wife's 99 Cabrio.. Does anyone have an idea on what I might need to check.. Sensor or something else bad that would break ground to the fuel relay? |
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ps2375
Samba Member
Joined: April 24, 2014
Posts: 2471
Location: Meridian,ID
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| Posted: Sat Jul 08, 2017 7:02 pm Post subject: Re: 1999 cabrio..No ground to relay under dash |
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| That would be controlled by the ECU. It's called ground switching and is easier for the ecu to control the relays by turning on/off the ground to a relay than to control power to them. Does it provide a priming pulse? Does it not see an rpm signal when cranking? What kind of diagnostics have you actually done? |
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