The wiring loom is in a mess nead a compleat loom for a 1987 gsx750h model cant find one anywhere

if its radio wiring that is easy

cant find the repair manual . electrical wiring sections anywhere on the net
if in need engine bay wiring loom or specific electronics systems
an auto electrician will have them

Look on ebay for pix of the same model of bike up for sale.
You may find pix of a damaged or part built one.

hi. there cheryl it is dangerous to mess around with the wiring loom
if you are not careful. you could start a fire. my advise is if you dont
know about electrics leave it to the professionals. be safe

hi
we need to know what model
xj 650, xj 650 maxim, xj 650 seca
xs 650 1 xs 650 2
different models different wiring looms

Use Google website to download a wiring diagram.

If it has a distributor, it's taped on the right side of the engine in/around the large wire loom that crosses to the right fender.. I have seen the connector melted on the exhaust manifold before. If it had DIS, it's on the left side of the engine, near the DIS module.

You bet it can.

Yes the White wire is the reason. It goes to the Internal Regulator.
As you view the connector that plugs into your alternator, look at where the lock tab is.
Lock tab on TOP. The Black wire goes to the Left side. The White wire goes to the Right side.

The Black wire, ties into the Red wire down in the wire loom. (The Red wire goes to the starter solenoid, and this is connected straight to the battery. This is why the Red, AND the Black wire, are both Hot wires)

The White wire goes through the bulkhead wire loom, and to the bulkhead connector.

(Down under the steering shaft, and on the firewall, you'll see a rectangular Black box shape, with a Bunch of wires, coming into it from the engine compartment. The bulkhead connector is two pieces. Following it through the firewall, the other side of it is the fuse panel)

Where the White wire connects in the fuse panel,
it should go straight to the ACC fuse. (Accessory)

Wiring relays and connections – all modelsRelays (typical)

1 Vacant
2 Intake manifold preheating relay (carburettor models) or fuel
pump relay (injection models)
3 Seat belt warning system relay
4 Gearshift indicator control unit
5 Air conditioner relay
6 Dual tone horn relay
7 Relay for foglights and rear foglight
8 Relief relay for X contact
10 Intermittent wash/wipe relay
11 Rear window wiper relay
12 Turn signal flasher or trailer towing warning relay
13 Seat belt warning system (interlock) or rear window, driving
lights and oil pressure warning relay
14 Window lift or seat belt warning system relay
15 Headlight washer relay
16 Control unit for idling speed increase
17 Fuse for rear foglight
18 Control unit for coolant shortage indicator
19 Thermo fuse for window lifters
20 Switch unit for heated driver’s seat
21 Switch unit for heated passenger’s seat
22 Switch unit for overrun cut-off
23 Vacant
24 Vacant
Relays are symbolised as a number in a black box
Not all relays are fitted to all models
Connections
A Multi-pin connector (blue) for dash panel loom
B Multi-pin connector (red) for dash panel loom
C Multi-pin connector (yellow) for engine compartment loom left
D Multi-pin connector (white) for engine compartment loom right
E Multi-pin connector (black) for rear wiring loom
G Single connector
H Multi-pin connector (brown) for air conditioner or wiring loom
K Multi-pin connector (transparent) for seat belt warning system
loom
L Multi-pin connector (black) for lighting switch terminal 56 and
dip and flasher switch terminal 56b (carburettor models) or
multi-pin connector (grey) for dual tone horn (injection models)
M Multi-pin connector (black) for lighting switch terminal 56 and
dip and flasher switch terminal 56b (injection models)
N Single connector for separate fuse (manifold heater element)
P Single connector (terminal 30)
R Not in use
Fuse colours
Blue 5A
Green 30A
Red 10A
Yellow 20A