Electrical V8 Swap Wiring Questions.. Help

StarvinMarvin

New Member
Apr 29, 2013
4
0
1
26
Swapping a 90 v8 into a 93 4cyl shell. I have the v8 harness from the 90 and I need to know if /where/how have to wire in a fuel pump relay and if I have to mess with the maf.
I am doing a 3g alternator conversion and using the stock 4cyl headlight/alt harness and extending it.
Also what computer do I need to run?
 
  • Sponsors(?)


stykthyn

I want to measure mine. It doesn't look that tall.
10 Year Member
Jul 6, 2006
5,302
2,733
223
gainesville
I don't believe the 90 engine harness will work with the 93 body/dash harness. Easiest thing to do would be to source a 92/3 engine and maf harness. No splicing or integrating needed.
 

jAEded

Active Member
Aug 12, 2013
418
26
39
Cali
Nope... The 93 was a unique one. One of the changes was the fuel pump relay moved from under the seat to near the airbox. Wiring harness in the dash is different & wiring harness in the doors is different.

I'm actually doing something similar minus the 4 cy. I have a 91 im converting over to a 93.

To use a 93 harness you have to change all the wiring over to a 93. Time consuming but its do-able. If you have the option, other years are more flexible than the 93.

Edit: Also, 93 used a different latch mechanism for the rear hatch so you need that and the catch stud as well.
 

jAEded

Active Member
Aug 12, 2013
418
26
39
Cali
On the hatch I think i'm wrong. I have a 89, 91 & a 93. The 93 actuator is different but functions the same as the others. The wiring pigtails on the inside driver quarter, where it connects to the harness, are the same.

The door harnesses are different on the inside of the door where it connects to the power window switches but if you use a entire door, the connectors that connect the door to the harness on the inside by the kick panels are the same.

Honestly its safer to just use the whole thing from whatever year you want to go with.
 
  • Like
Reactions: jrichker
Thread starter Similar threads Forum Replies Date
J questions for 2.3 to 5.0 carb swap Fox 5.0 Mustang Tech 5
T 2.3 To 5.0 Wiring Questions Fox 5.0 Mustang Tech 1
B 5.0 Swap Fuel Pump Wiring Question? Please Help! Fox 5.0 Mustang Tech 4
Back in Black Wiring Harness Question On 4v Swap SN95 4.6L Mustang Tech 1
SLYFOX89 3g swap questions on wiring HELP!!!!! Fox 5.0 Mustang Tech 7
0 Auto to manual swap - ECU wiring harness the same? Also SF3/ECU questions... SN95 4.6L Mustang Tech 7
C 351w swap wiring question... Fox 5.0 Mustang Tech 1
M EFI to Carb Swap Wiring Questions Fox 5.0 Mustang Tech 0
B T5Z wiring question for AOD swap Fox 5.0 Mustang Tech 9
coupe5.0 AOD swap questions-wiring and flexplate Classic Mustang Specific Tech 14
GSXRMIXXER Cluster Swap Wiring Questions **PLEASE HELP** Fox 5.0 Mustang Tech 12
my70stang Another 5.0 swap question, wiring harness Classic Mustang Specific Tech 6
sweet88gt 3 g alt swap question about the 2 capped wires Fox 5.0 Mustang Tech 1
P 5.0 Swap Wiring Harness Mod Question Classic Mustang Specific Tech 14
E t5 swap questions-wiring 2.3L (N/A & Turbo) Tech 10
W Wiring question 351W swap 1974 - 1978 Mustang II Talk & Tech 0
stackz wiring questions for my swap while I build the engine tonight, help ASAP!! 2.3L (N/A & Turbo) Tech 1
Mustang5L5 AOD-to-T5 swap. Wiring question. Fox 5.0 Mustang Tech 10
C 5SPD swap, wiring question Fox 5.0 Mustang Tech 1
9 Coyote swap alternator wiring 1996 - 2004 SN95 Mustang -General/Talk- 6
9 97 Cobra Coyote Swap Alternator Issue 1996 - 2004 SN95 Mustang -General/Talk- 2
Q Foxbody 5.4 4V Build Thread 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 10
S Explorer 5.0 swap Fox Engine Swaparoo 1
T Need help with Wiring (obd2/DLC) SN95 4.6L Mustang Tech 2
Bburns25 First engine swap and wire tuck 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 12
L 86 is 2.3 carb to 5.0 carb swap underhood wiring info Fox 5.0 Mustang Tech 1
paddyrk Electrical 1991 LX 5.0, radio wiring help, ECU swap Fox 5.0 Mustang Tech 2
T Help! Radio And Wiper Blades Not Working After Engine Swap 1996 - 2004 SN95 Mustang -General/Talk- 0
T Horn And Cruise Wiring On Tilt Swap Fox 5.0 Mustang Tech 9
CobraWannabe 93 V8 Swap Into 90 4 Cyl. Wiring Harness Help Fox 5.0 Mustang Tech 1
MustangMando Efi Swap In A 68 Mustang, Wiring Help 1965 - 1973 Classic Mustangs -General/Talk- 7
R 5.0 Swap: Which Wiring Harness Fox 5.0 Mustang Tech 5
98blackstallion Carb swap into my 95 gt. Wiring issue? 1994 - 1995 Specific Tech 1
C What wiring harness is required in a 2.3 to 302 carbbed swap? HELP Fox 5.0 Mustang Tech 0
J 4.6 swap wiring harness Regional Forums and Event Information 0
leasureryan 98-99 driver seat swap wiring??? SN95 4.6L Mustang Tech 1
C 65 Radio Swap - Wiring Help Classic Mustang Specific Tech 2
screamin gt fan swap - wiring... SN95 4.6L Mustang Tech 4
S A4LD Transmission Swap - making a 2-wire transmision work in a 3-wire car... 2.3L (N/A & Turbo) Tech 2
H Wiring/SWAP 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 1
C 86 carb swap wiring???? Fox 5.0 Mustang Tech 0
M E.F.I. 2 Carb swap Wiring relay 4 fuel pump. Fox 5.0 Mustang Tech 1
StreetDreamsGT Swapped an 88 steering column into my 92 what do I do about the wiring? Fox 5.0 Mustang Tech 4
Mustang5L5 What is the RIGHT way to change the wiring for an AOD-to-T5 swap?? Fox 5.0 Mustang Tech 11
90 lx convert A9p To a9l swap, wiring diagrams? Fox 5.0 Mustang Tech 5
2 swapping fox wiring into 94-95GT ??? 1994 - 1995 Specific Tech 1
9 wiring help on 4cyl to 8 swap Fox 5.0 Mustang Tech 2
8 wire harness swap on 88 lx Fox 5.0 Mustang Tech 2
dbdragracing T-5 Swap Wiring Fox 5.0 Mustang Tech 6
dbdragracing T-5 Swap Wiring 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 0
Similar threads