djhedges Posted May 21, 2023 Report Share Posted May 21, 2023 I'm getting to build my first wiring harness and would appreciate one more review and a few questions before I get started. Below my current plan for the PDM pins. It's a NA build with 12:1 compression on stock injectors. ECU is a Link Fury. razor_pdm:ADIO1,link_ecu_a:+14V razor_pdm:ADIO1,link_ecu_b:+14V Aux9/10 razor_pdm:ADIO2,idle_stablizer_valve:Pos razor_pdm:ADIO3,vapor_purge_valve:Pos razor_pdm:ADIO4,LSU4.9:Heater Power razor_pdm:ADIO5,aux_coolant_pump:Pos # Secondary small electral water pump that had a 5 amp fuse razor_pdm:ADIO5,transponder:pos razor_pdm:ADIO6,coolant_temp_gauge:12v razor_pdm:ADIO6,fuel_pressure_gauge:12v razor_pdm:ADIO6,link_keypad:+12V razor_pdm:ADIO6,transmission_temp_gauge:12v razor_pdm:ADIO7,wiper:high razor_pdm:ADIO8,wiper:park razor_pdm:CANH,link_ecu_b:DI10/CAN2H,link_keypad:CAN High razor_pdm:CANL,link_ecu_b:DI9/CAN2L,link_keypad:CAN Low razor_pdm:IGNSW,ign_switch:2 razor_pdm:PWROUT1a,fuel_pump:pos # rockauto lists a bump with 8 amps average razor_pdm:PWROUT1b,coil:Ubatt # <8 amps according to bosch motorsports catalog. razor_pdm:PWROUT1b,injectors:Pos razor_pdm:PWROUT2a,brake_lights:pos razor_pdm:PWROUT2b,brake_lights:pos razor_pdm:PWROUT3a,starter:solenoid razor_pdm:PWROUT3b,starter:solenoid razor_pdm:PWROUT4a,spal_fan_1:pos # 7.6 amps razor_pdm:PWROUT4b,spal_fan_2:pos #6.3 amps razor_pdm:neg,battery:neg razor_pdm:pos,kill_switch:starter What is the current draw of the Link Fury ECU? I'm hoping a single ADIO pin is enough to suppor the ECU. I planned to run the coils, injectors & fuel pump off the same high output. Should I also add individual inline fuses? The car had 5v front/rear brake pressure sensors that I was planning to wire to the ECU. Is it silly to drive the brake lights over CAN to the PDM? Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 21, 2023 Report Share Posted May 21, 2023 5 hours ago, djhedges said: What is the current draw of the Link Fury ECU? I'm hoping a single ADIO pin is enough to suppor the ECU. Yes that will be fine, maybe 5A max for a very short time on fast throttle movements, most of the time prob less than 2A. 5 hours ago, djhedges said: I planned to run the coils, injectors & fuel pump off the same high output. Should I also add individual inline fuses? That should be fine with just the PDM "fuse", set around 10A. 5 hours ago, djhedges said: The car had 5v front/rear brake pressure sensors that I was planning to wire to the ECU. Is it silly to drive the brake lights over CAN to the PDM? That is fine. A couple of other comments; Bench test the starter solenoid before committing to confirm the PDM can handle it, some of those are huge inrush and about 30A continuous on the pull winding. I would also test the fans too, those currents sound suspiciously low for Spals. The idle valve, purge valve and LSU could likely all go on one ADIO to leave a couple of spares. Quote Link to comment Share on other sites More sharing options...
djhedges Posted May 21, 2023 Author Report Share Posted May 21, 2023 Thanks for the suggestions. So for the idle valve & purge valve should I ground those to the ECU? If so which pin? Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 22, 2023 Report Share Posted May 22, 2023 Yes the ecu would control the ground side of those solenoids. The idle valve should be connected to Aux 1-10, the purge could be any aux or spare inj drive. Quote Link to comment Share on other sites More sharing options...
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