93 pathfinder (V6) wiring harness into 87 D21 - Infamous Nissan

Tryintomakeitwork · 05-10-2020, 04:43 AM

Is the 93 pathfinder V6 wiring harness as a whole a direct plug and play with a 87 hardbody V6? I’m talking about the fuzes and the connectors, everything. I’ve been searching the forums but nothing has been said about the whole harness. Any help would be appreciated. If there is a thread someone can link me to for this dilemma I would equally appreciate that as well.

Deerhurst · 05-10-2020, 05:03 AM

Most folks with TBI either stay TBI or go carbed.

The 93 is MPFI which means at very least the fuel injection system is different as far as the wiring. The ECM is also different as there are more injectors. 93 was a turning point with the D#1, so likely with the WD21 too, where the speedo changed from mechanical to electronic so the instrument cluster and speed sensor circuit will be different. Lotta little things were changed.

I'm not sure when it changed but with the R50 Pathfinder the location of the alternator and power steering pump was on different sides of the motor from the truck. That would complicate wiring too as the pigtail would be in the wrong spot.

I am planning a similar swap but more custom once I find a seller with a blower that isn't a flake. When/if I get to do this I will do a full write-up.

What is your end goal? Motor swap? MPFI swap?

Motor swap is easy. Swap the block and put your injection system and intake back on. MPFI swap will turn into custom wiring and in my case a custom ECM and tune.

Tryintomakeitwork · 05-10-2020, 11:37 AM

My end goal is to replace the wiring I’m my truck. The previous owners messed all of the wiring up and now looks like a rats nest and everything has been twist spliced with electrical tape and none of it even matches up as far as color codes. Nothing is labeled and now I’m trying to make it right again.i found a 93 pathy at my pick n pull and was trying to make it work.

Deerhurst · 05-10-2020, 01:43 PM

I think the newer pathy harness will add quite a bit of complexity and no, it will not just drop in.

Hardbody92 · 05-11-2020, 11:07 AM

You picked the wrong year, 93 v6 is a bastard year. I've had nothing but trouble with my 93 pathfinder SE. I can tell you the injector harness is slightly different than a 94 and up.
My personal opinion, once you have a wiring problem with these trucks you are in a world of shit.

05-10-2020, 05:03 AM	#2
Deerhurst 4/86 SE-V6 2 tone 4x4 HB Join Date: Apr 2013 Location: Oregon Posts: 7,155 Vehicle: 1986.5 SE-V6 4WD D21, 2003 Audi A4 Avant 3.0 Quattro Thanks: 876 Thanked 848 Times in 775 Posts	Most folks with TBI either stay TBI or go carbed. The 93 is MPFI which means at very least the fuel injection system is different as far as the wiring. The ECM is also different as there are more injectors. 93 was a turning point with the D#1, so likely with the WD21 too, where the speedo changed from mechanical to electronic so the instrument cluster and speed sensor circuit will be different. Lotta little things were changed. I'm not sure when it changed but with the R50 Pathfinder the location of the alternator and power steering pump was on different sides of the motor from the truck. That would complicate wiring too as the pigtail would be in the wrong spot. I am planning a similar swap but more custom once I find a seller with a blower that isn't a flake. When/if I get to do this I will do a full write-up. What is your end goal? Motor swap? MPFI swap? Motor swap is easy. Swap the block and put your injection system and intake back on. MPFI swap will turn into custom wiring and in my case a custom ECM and tune. __________________ 1986.5 SE-V6 4X4 D21 Hardbody Pacesetter Long Tube Headers Morimoto Mini D2S HID Projectors and Hella 500s VG33i

05-10-2020, 01:43 PM	#4
Deerhurst 4/86 SE-V6 2 tone 4x4 HB Join Date: Apr 2013 Location: Oregon Posts: 7,155 Vehicle: 1986.5 SE-V6 4WD D21, 2003 Audi A4 Avant 3.0 Quattro Thanks: 876 Thanked 848 Times in 775 Posts	I think the newer pathy harness will add quite a bit of complexity and no, it will not just drop in. __________________ 1986.5 SE-V6 4X4 D21 Hardbody Pacesetter Long Tube Headers Morimoto Mini D2S HID Projectors and Hella 500s VG33i

05-11-2020, 11:07 AM	#5
Hardbody92 Join Date: Jan 2013 Location: South West Florida Posts: 919 Vehicle: 1992 hardbody Thanks: 342 Thanked 121 Times in 113 Posts	You picked the wrong year, 93 v6 is a bastard year. I've had nothing but trouble with my 93 pathfinder SE. I can tell you the injector harness is slightly different than a 94 and up. My personal opinion, once you have a wiring problem with these trucks you are in a world of shit. __________________ What do you get from a nervous cow.... A milk-shake

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05-10-2020, 04:43 AM	#1
Tryintomakeitwork Join Date: May 2020 Location: Virginia Posts: 2 Vehicle: Nissan Pickup SE 1987 Thanks: 0 Thanked 0 Times in 0 Posts	93 pathfinder (V6) wiring harness into 87 D21 Is the 93 pathfinder V6 wiring harness as a whole a direct plug and play with a 87 hardbody V6? I’m talking about the fuzes and the connectors, everything. I’ve been searching the forums but nothing has been said about the whole harness. Any help would be appreciated. If there is a thread someone can link me to for this dilemma I would equally appreciate that as well.

05-10-2020, 11:37 AM	#3
Tryintomakeitwork Join Date: May 2020 Location: Virginia Posts: 2 Vehicle: Nissan Pickup SE 1987 Thanks: 0 Thanked 0 Times in 0 Posts	My end goal is to replace the wiring I’m my truck. The previous owners messed all of the wiring up and now looks like a rats nest and everything has been twist spliced with electrical tape and none of it even matches up as far as color codes. Nothing is labeled and now I’m trying to make it right again.i found a 93 pathy at my pick n pull and was trying to make it work.