1978 Toyota Pickup 20R-Fuel Pump Relay Replacement/Substitute скачать в хорошем качестве

1978 Toyota Pickup 20R-Fuel Pump Relay Replacement/Substitute

Trying to explain that you do not have to buy the expensive ($80-$120!) Toyota Circuit Opening Relay (COR), also known as a fuel pump relay, but that you can replace it with a common BOSCH style relay for much less $. This will work on most Toyotas with 20R or 22R engines with a carburetor & an electric fuel pump in the gas tank (up to 1995). I have provided wire colors & diagram for the 77 & 78 pickup here; others will be similar. Please check the SPECIFIC wiring diagram for your vehicle (Haynes manuals usually have them). 2 additional notes: 1. Make sure you get a 5 pin BOSCH style relay, NOT the 4 pin, & make sure it is rated for 30/40 AMPS. The regular 30 AMP units will work harder over time and fail on you sooner. 2. The switch position shown on the relay cover (and in the diagram) is where the switch rests in the UNACTIVATED POSITION. That is, with the coil NOT energized. The lack of this little bit of info is what took me days to figure out the circuit. Once I knew this, the rest of it was easy. 3. I also have on file a detailed section of the wiring diagram that shows how the original relay is wired, plus the wire colors. I put a picture of it at the end of the relay video. The colors are (primary wire color 1st, stripe color 2nd): Start - Black/White Run - Black/Yellow Ignition - White/Blue Fuel Pump - Black/Red Oil Sender Switch - Yellow/Black As for the numbers on the Bosh Relay it should be: 85 - Oil Sender 86 - Ignition 30 - Fuel Pump 87a - Run 87 - Start This should apply to all 1972-1978 trucks. I used the spade lugs so I didn't have to cut off the original Toyota Relay Style connector. UPDATE 10/2019 - I have since found out a few things. 1. This conversion WILL work on the EFI equipped 22RE engines. The only difference in how it works is that the "on/off" signal to the relay is done by a switch in the Air Flow Meter instead of from the Oil Sender Switch. Other than that, the circuit is electrically the same. 2. Any OEM style of Circuit Opening Relay (Fuel Pump Relay) for up to a 1995 Pickup will fit the original socket; it is the same design. From 1996 & newer they changed the socket configuration & those will NOT fit. The up to 1995 relay also usually comes with a handy metal tab on it so you can mount it easily in original location with the original bolt. Recommended OEM style relay is DENSO Part # 5670045. OEM quality, about $30 to $40 as of 10/2019. If you just want to change out the relay & go this is the way. 3. It's been over 2 years now & the Bosch style relay & the wire harness I fabricated is still working perfectly.