Hey all, need some some. I do not have the shop manual. 1994 S10 blazer 4x4, 4 wheel ABS. It is not functioning, light on dash goes on after 5mph. These are the codes I get,
12
41
42
45
46
51
52
65
67

What do all these point to??

 

12 - I dunno, maybe check sequence.
41- Right front Solenoid Valve Fault
42- Electrical disturbance outlet valve(right front)
45- Electrical disturbance inlet valve (left front)
46- Electrical disturbance outlet valve (left front)
51- Electrical disturbance inlet valve (right rear)
52- Electrical disturbance outlet valve (right rear)
65- no idea nothing listed
67- no idea nothing listed

Definitely have electrical issues, would suggest you seek out a ASE Certified mechanic.

 

Yeah.. do that. If they have that cert on the wall that means they must know their stuff...
/sarc
Dear OP. You have primary power issues. Remove all connectors in the harness, check for burnt, discolored or bent. spray out with contact or MAF cleaner.
Trace wiring back to source, esp black or black with white stripe to ground points, and red or pink to fuses and control modules.

OTOH, ask around your friends and neighbors for references on where they got THEIR electrical problems fixed.
If you cant find raves, you're better off taking it to a dealer than screwing around with an independent or franchise shop. Most dealers cant afford to hire test-passers. Most dealer techs do know their ****.

 

Your best dvice yet, as we are dealing with a braking system for a person with unknown ability. Would you want that kinda liability on your conscience? I don't. And BTW, No Sarc implied, there Petty.

 

Good point.
However.. the person came here for help, it's up to him to decide which advice is germane and which is not.. and which could be possibly harmful. And that's what we are here for as well.

To address the specifics, his problem apparently is more a general type electrical problem than specific to braking system.

You will note my advice on what he might do to find the problem did not deal with critical intervention in the heart of the systems.
It'd be real easy to just tell anyone who had a problem dealing with brakes.. or critical suspension.. or steering weirdness to go see 'an ASE certified Mechanic' wouldnt it?
The big point is, there is no guarantee the ASE certified mech working on the car is actually certified as a specialist in either brakes OR electrical systems.

I've dealt with and sometimes supervised 'certified professionals', if you call a graduate engineer a certified professional. Some of them are really competent, some are good.. more of them are just rote performers who can perform step by step instructions but at the end of the day have no idea why their repair worked.

There is no way of knowing if any given shop will have the tech on duty who is competent in electrical systems.. or, if there is one, if he will actually be assigned the work. That is why I advised the OP that, if he couldnt find a good reference to a specific shop to take it to a dealer shop. As I said they cant afford to employ test-passers.

 

Thanks for the help and info. The brakes themselves seem to function perfectly...............that is without the presence of any ABS. The little "motor" does not turn on. Either frozen motor or as you both have stated, numerous electrical issues. I am getting full 12 volts to the unit, need to trace and check grounding. Every time I start the truck, no abs light. Then when I start moving about 5 mph, the light kicks on and stays on until next time I start truck, and it always kicks those codes. I did pick up a complete ABS unit including master cylinder from a knwon working 94 parts Blazer last week. I have not put it in yet. Figure I shall cintinue do the diagnostic tests suggested. I am sure I casm search this, but on the 94 s10, is there an ABS fuse I should look for? Under hood? Under dash? I need to invest in a shop manual