Relay Confusion
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Join Date: Nov 2002
Location: Stuttgart, Germany
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Greetings,
I'm looking to pick up a couple of spare round relays (along with a DME relay) from Pelican Parts. Here's my confusion:
- My '89 3.2 has five red round relays, part # 911-615-108-01. These are for the footwell blower motors, oil cooler fan, cruise control, horn, fog lights, and A/C condensor blower. According to Pelican parts, this part # is for the fuel pump relay. If I'm not mistaken, the fuel pump relay is incorporated into the DME relay?
- Pelican parts lists part # 911-615-109-01 as the correct relay for these components. It is a round black, 5-pin relay that looks similar to the round red ones.
Everything seems to work except for the cruise control. Do I have the wrong relays in there? Or are they the same? My Bentley manual doesn't offer much clarification.
TIA, Greg
I'm looking to pick up a couple of spare round relays (along with a DME relay) from Pelican Parts. Here's my confusion:
- My '89 3.2 has five red round relays, part # 911-615-108-01. These are for the footwell blower motors, oil cooler fan, cruise control, horn, fog lights, and A/C condensor blower. According to Pelican parts, this part # is for the fuel pump relay. If I'm not mistaken, the fuel pump relay is incorporated into the DME relay?
- Pelican parts lists part # 911-615-109-01 as the correct relay for these components. It is a round black, 5-pin relay that looks similar to the round red ones.
Everything seems to work except for the cruise control. Do I have the wrong relays in there? Or are they the same? My Bentley manual doesn't offer much clarification.
TIA, Greg
#2
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Greg: The red relays first appeared as a fuel pump relay, they are a heavy duty version of the black look-alike relay, but otherwise the same. You can use a red one in any black relay position, but other than in an emergency you should not use a black one where a red relay is called for.
Pete
Pete
#3
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I'm resurrecting this thread because - as happens often with this car - I'm confused.
All of the round relays in my '86 front fuse box are black. While my fuel pump seems to be working fine, should I replace it now with a red relay?
Pelican lists the genuine Porsche part as OEM-911-615-108-1.
One more question. Some have said that the fuel pump relay is incorporated in the DME relay under the driver's seat. Are they wrong, or does it too play a role in fuel pump operation?
I swear, this car is giving me an education every day.
One more question...
All of the round relays in my '86 front fuse box are black. While my fuel pump seems to be working fine, should I replace it now with a red relay?
Pelican lists the genuine Porsche part as OEM-911-615-108-1.
One more question. Some have said that the fuel pump relay is incorporated in the DME relay under the driver's seat. Are they wrong, or does it too play a role in fuel pump operation?
I swear, this car is giving me an education every day.
One more question...