issues starting up

[Angie]

ok so far since I have had my baby I have had to replace a thermostat housing for a leak problem but when we went to replace the housing my husband broke the alternator bracket so have place that now she wont start. replaced the battery and the battery light came on again.....any thoughts

 

[tjkj2002]

How did you break the ALT bracket changing the t-stat housing?

Did you plug the ALT back in? I've seen that more then once from DIY'ers.

 

[Angie]

yes it's plugged back in but I dk if it is the fuse itself that might be blown or the alternator or worse

 

[tjkj2002]

yes it's plugged back in but I dk if it is the fuse itself that might be blown or the alternator or worse

Did you disconnect the battery before unhooking the alt? If not I'd be looking at the fuses and relays.You could have fried the PCM also since the voltage regulator is inside the PCM and not part of the Alt.

 

[Angie]

that little bolt hole that lifts the alternator up and keeps the belt tight snapped right in half

 

[tjkj2002]

that little bolt hole that lifts the alternator up and keeps the belt tight snapped right in half

The KJ,all engines,use a auto tensioner so the ALT is bolted in place.


Still like to know why you were removing the Alt to chnage the t-stat as I asume you have the 3.7 V6.

 

[Angie]

not that I know of but the fuses are the all blacks so im assuming that you can't tell if they are blown or not...so gonna try replacing all of them

 

[Angie]

no I have a 4 ****** 2.4

 

[Angie]

is there any way to tell if they are blown other than taking them out one by one?

 

[Billwill]

not that I know of but the fuses are the all blacks so im assuming that you can't tell if they are blown or not...so gonna try replacing all of them

What do you mean all the blacks? The large black cubes are relays...there are fuses next to the relays under the hood and also fuses in the fuse box inside the cabin. You ideally need a Multimeter to check the fuses.

Check the small connector going to the alternator has not pulled out...this controls the charging rate...controlled by the PCM.

The large thick cable coming from the alternator to the positive side of the battery actually has a "fusable" link inbedded inside it near to the battery terminal. This is a type of heavy-duty fuse that will blow if you touched that wire to ground with a wrench while doing your repairs.

You need a voltmeter...put the black lead of the meter to ground some where.ie. the engine or use the negative terminal on the battery. If you place the red meter lead on the battery positive lead you should read about 12 volts (DUHH:jawdrop. Now if you move that red meter lead along that fat wire going to the alternator you should also expect to see 12 volts unless the "fusable" link has blown!

 

[Angie]

ok I have found what I think is a fusable link its two plugs male and female connected together near the positive battery terminal but I traced the line and it doesnt seem to go to the alternator it looks like it goes down towards the bottom of the engine. am I looking for a fuse or something else. also if im correct there is only one red wire coming from the alternator to the battery and a ground.

 

[Billwill]

ok I have found what I think is a fusable link its two plugs male and female connected together near the positive battery terminal but I traced the line and it doesnt seem to go to the alternator it looks like it goes down towards the bottom of the engine. am I looking for a fuse or something else. also if im correct there is only one red wire coming from the alternator to the battery and a ground.

I dont know what year your KJ is but my 2002 circuit diagram shows that the 2.4 Gasser has a Black/Grey wire going from the alternator...connecting to a Dark Green fusable link which connects first to the Power Distribution Center which is the fuse box under the hood and then to the battery. I do not always trust these diagrams though...the main thing is that you must get a reading of +12 volts on the thick wire at the alternator compared to ground even when ignition is switched OFF.

There should also be a grounding lead for the alternator going to ground and another small two-pin connector plugging into the alternator..Dark Green wire and White/Dark Blue wire.....this is what energizes the alternator to produce the correct charging voltage...maybe you knocked this plug off?:icon_sad: