130 amp alt upgrade DIM HEADLIGHTS???

[bryanrevans]

I recently did the bolt on's listed and when I turn headlights on they are weak dim.The car had a 50 amp stock alt.When the electric fan kicks on it draws on the motor.This I kinda understand...(cheap fan controller with no relay)But the headlights I dont get?????

 

[D347643]

did you upgrade your wiring and i assume its a 3g so i "assume" you converted your wiring to 3g also, right?

 

[bryanrevans]

yes 4g wire to starter solenoid but......I had no white wire on my harness!No where so I got a 3 wire plug from junkyard to replace my 2 wire plug.I connected the j.y. white wire to white wire on back of alt and other 2 wires to new plug and plugged it in.I left the old large plug with 2 10 guage wires alone hanging??????Good or bad??????

 

[bryanrevans]

Every instruction I found on stangnet and magazine articles were never for a 86 5.0 My entire alt. wireing harness had no white wire in it.Just 2 10g black,1 green,1 yellow thats it!!!!!!!!!!

 

[bryanrevans]

4 wires total.Every other fox has a different harness.Except for those with external voltage regulator.

 

[91mustangnick]

i have a 130amp 6G alt. and i didnt have to use the white wire. the white wire on my 1991 went from one part of the alt. to the other part, and the harness didnt have a place for the white wire. car runs great.

Nick

 

[bryanrevans]

when i put a meter on bat with engine at idle I get aprox 13.5 volts and my batt guage is reading slightly on the minus side of half

 

[HISSIN50]

how did you wire up an electric fan with no relay?

with 20 year old wiring, you could have a decent voltage drop through that stock wiring and switches, to the headlights. i installed relays on lows, highs and fogs to help with this situation (gets battery power to the lights rather than using the recursive stock wiring).
and it sounds like either you have a voltage drop in the wiring or an inaccurate gauge (dont 86's have an ammeter rather than a voltmeter?). straight up on an ammeter gauge would be around 12.6 volts.
good luck.

 

[bryanrevans]

I ran the power source straight from the battery.under hood light actually.for the fan.When I tried to use a switchable power source(wiper motor red wire) the fan would kick on and off every 1-2 sec, so I ran it to underhood light.fan keeps running after I park tho

 

[Nutzy19]

Call P.A.PERFORMANCE and have them send you the 15.00 wiring kit for your 86....http://www.pa-performance.com/display.asp?sku=27&rP=searching,cat@Plugs+and+Wire+Kits,cR@categories

 

[bryanrevans]

Thats what I have on there now.but I used the jy plug and white wire on back of 3g alt

 

[jrichker]

The secondary power ground is between the back of the intake manifold and the driver's side firewall. It is often missing or loose. It supplies ground for the alternator, A/C compressor clutch and other electrical accessories such as the gauges. Any car that has a 3G alternator needs a 4 gauge ground wire running from the block to the chassis ground where the battery pigtail ground connects.

 

[bryanrevans]

A light bulb just went off!!!!!!!When I pulled motor that wire snapped.I did a quick fix.I will upgrade that to 4 guage and securly ground that.Thanks for pointing me in this direction!!!!!!!!